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Equine Pelvis & Repro
Quiz 2
292
Anatomy
Professional
09/15/2010

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Term
What is evaluated when considering the birth canal?
Definition
Pelvimetry
Term
What are the 5 components of pelvimetry?
Definition
Transverse diameter, Conjugate diameter, Vertical diameter, Pelvic inclination, Pelvic axis
Term
What is the Cr most part of the pelvic symphysis?
Definition
Pecten of os coxa
Term
What is the V enlargement of S1?
Definition
Sacral Promontory
Term
Where is the transverse diameter widest in the mare?
Definition
Between or just above acetabula
Term
Conjugate diameter
Definition
Line extending from pecten to sacral promontory
Term
Vertical diameter
Definition
Pecten of pubis to V surface of sacrum or Cd 1 vert
Term
The vertical diameter is usually ____ to the pelvic floor.
Definition
Perpendicular
Term
Pelvic inclination
Definition
Angle subtended @ the pecten of the pubis by the conjugate & vertical diameters
Term
Pelvic axis
Definition
Median line drawn btw pelvic surface of sacrum & D surface of pelvic symphysis
Term
What component of pelvimetry defines the midpoint?
Definition
Pelvic Axis
Term
Is a straight or curved pelvic axis better for parturition?
Definition
Straight
Term
Compared to the ox, the horse has a ____ ischial tuberosity & ischial spine.
Definition
Flat
Term
The horse has a ____ sacrotuberous lig., whereas the dog has a ____ one.
Definition
Well developed broad; less developed
Term
In the mare, the pelvic entrance is ___ & ___.
Definition
Wide & Round/Symmetrical
Term
In the stallion, the pelvic entrance is ____.
Definition
Triangular
Term
The pelvic floor in the mare is ____ & ____.
Definition
Flat; nearly horizontal
Term
The ____ of the pelvic cavity is nearly straight.
Definition
Long axis
Term
In the mare, the features of the pelvis are in accord w/ ______.
Definition
Easy parturition
Term
In the mare, the ____ walls of the pelvis have ______ than in the dog or ox.
Definition
Lateral; more soft tissue
Term
The pelvic cavity in the mare is relatively _____.
Definition
Roomy
Term
The mare has a generally _______ pelvic axis.
Definition
Horizontal
Term
The pelvic exit in the mare is relatively ____.
Definition
Free
Term
Describe the scrotum of the stallion.
Definition
Globular w/ no distinct neck; tightly encloses the testis
Term
Testes of the stallion are relatively ____ in the scrotum.
Definition
Immobile
Term
The testes of the stallion are ____ to the ____ end of the pelvis.
Definition
V, Cr
Term
Can the scrotum of the stallion be seen from a Cd view? Why/why not?
Definition
No; high between the thighs
Term
The scrotum of the stallion has ____ hair, & ____ look & feel (____).
Definition
sparse; oily (glistens)
Term
What is btw the 2 halves of the scrotum in the stallion?
Definition
Median Scrotal Raphe
Term
What artery supplies the scrotum in the stallion?
Definition
External pudendal a.
Term
What type of castration separates the skin & external spermatic fascia from the cremasteric fascia?
Definition
Closed
Term
What are the tissue layers of the stallion's scrotum, from external to internal?
Definition
Skin, Dartos (tunica dartos), External Spermatic fascia, Cremasteric Fascia, Internal Spermatic fascia
Term
What is the tunica dartos composed of?
Definition
Fibroelastic tissue & smooth m.
Term
Is the tunica dartos easy or difficult to separate from the skin of the scrotum?
Definition
Difficult
Term
In the midline, the dartos forms the _____.
Definition
Scrotal Septum
Term
What attaches the dartos to the spermatic sac/vaginal tunic?
Definition
Scrotal lig
Term
The scrotal lig. attaches _____ to ____.
Definition
Dartos; Spermatic Sac (Vaginal tunic)
Term
The external spermatic fascia is derived from _____.
Definition
EAO
Term
The cremasteric fascia is derived from ____.
Definition
IAO
Term
The internal spermatic fascia is derived from ____.
Definition
TA
Term
The vaginal tunic is a diverticulum of the ____.
Definition
Peritoneal sac
Term
How does the external spermatic fascia attaches  to the dartos?
Definition
Loosely
Term
The cremasteric m. arises from the ____.
Definition
IAO
Term
In closed castration, one does not enter the _____.
Definition
Vaginal cavity of vaginal tunic
Term
The internal spermatic fascia adheres ____ to the _____.
Definition
Tightly; Vaginal tunic
Term
The cavity of the vaginal tunic is directly continuous w/ the _____.
Definition
Peritoneal Cavity
Term
What is the nerve supply to the scrotum?
Definition
V br's of L2&3 spinal nn.; a little from preputial & scrotal br. of pudendal n.
Term
Scrotal/_____ lnn. lie around the ____.
Definition
Superficial Inguinal; spermatic cord
Term
Describe the shape of the testis.
Definition
Rounded or oval; Flattened mediolaterally
Term
The testis has a ____ long axis.
Definition
Horizontal
Term
The spermatic cord is _____ to the long axis of the testis.
Definition
Nearly Perpendicular
Term
The mediastinum testis is ____.
Definition
Indistinct
Term
The epididymis lies on the ______ of the testis
Definition
D aspect
Term
Head of Epididymis
Definition
Caput
Term
Tail of Epididymis
Definition
Cauda
Term
The Caput Epididymis projects a little beyond _____.
Definition
Cr pole of testis
Term
The Cauda Epididymis projects more ____ beyond the ____.
Definition
Caudally; Pole of testis
Term
Describe the lig. of the tail of the epididymis.
Definition
Well-formed; Attaches tail to vaginal tunic
Term
What attaches the tail of the epididymis to the caudal pole of the testis?
Definition
Proper lig. of the testis
Term
What must be transected post-mortem to free the epididymis from the testis?
Definition
Proper lig. of the testis
Term
The deferent duct leaves the tail of the epididymis & ascends the _____ as part of the ____.
Definition
Inguinal canal; Spermatic cord
Term
What is the main blood supply to the testis & epididymis?
Definition
Testicular (Spermatic) a.
Term
What does the testicular/spermatic a. arise from?
Definition
Directly from the aorta
Term
The testicular a. is on the ____ border of the spermatic cord.
Definition
Cr
Term
The testicular a. is ____ as it approaches the testis. (an equine peculiarity)
Definition
Tortuous (Tortuous br's on surfaces of testis*)
Term
Where does the testicular a. send branches?
Definition
Testis & Epididymis
Term
What do vv. form around the testicular a. after leaving the testis?
Definition
Pampiniform Plexus
Term
What does the pampiniform plexus have to prevent back-flow?
Definition
Valves
Term
What vein is free from the pampiniform plexus, high up in the inguinal canal?
Definition
Testicular v.
Term
What blood vessel(s) run alongside the DD?
Definition
Cremasteric/Deferent a. & v.
Term
What large structures accompany the testicular & deferent vv.? Where do they go?
Definition
Lymphatic vessels; Medial iliac ln.
Term
What color is the parenchyma of the testis/epididymis?
Definition
Yellow
Term
Open Castration
Definition
Scrotal skin & vaginal process incised
Term
Closed Castration
Definition
Only scrotal skin incised; Transect distal to a ligature, or emasculate
Term
Emasculate
Definition
Testis is removed
Term
What is retained w/ sterilization?
Definition
Testis & Libido (Testosterone still produced)
Term
Sterilization
Definition
Vaginal process opened, Ligature btw tail of epididymis & body & DD; Remove intervening tail tissue
Term
How does removing the tail of the epididymis sterilize the horse?
Definition
Spermatozoa don't enter DD & can't be carried to exterior
Term
How many accessory sex glands does the horse have?
Definition
All of them
Term
What is the enlarged terminal part of the DD?
Definition
Ampulla of the DD
Term
What accessory sex gland is best developed in the horse?
Definition
Ampulla of the DD
Term
What is the ejaculatory duct?
Definition
The common duct of the ampulla of the DD & the ipsilateral vesicular gland
Term
Describe the ejaculatory duct. Where does it open?
Definition
Short; side of the seminal colliculus
Term
Seminal colliculus
Definition
D mound-like feature of initial part of urethra
Term
The ampulla of the DD has many _____ which secrete a lot of _____.
Definition
Tubular glands; Seminal Fluid
Term
The accessory sex glands are all within the _____.
Definition
Pelvis
Term
Are the accessory sex glands palpable per rectum?
Definition
Yes
Term
Which accessory sex glands are palpable per rectum?
Definition
All of them
Term
Name the accessory sex glands.
Definition
Seminal Vesicle, DD, Prostate, Bulbourethral, Ampulla of DD
Term
Unlike in other species, the equine vesicular gland is ______.
Definition
A true vesicle, being sac-like
Term
What is the shape of the seminal vesicle?
Definition
Pear-shaped
Term
The vesicular gland lies on the ___ side of the ___, within the ____.
Definition
D; Urinary Bladder; Genital Fold
Term
The vesicular gland has a ___ wall.
Definition
Simple
Term
The vesicular gland has ___ & ___ coats.
Definition
Serous & Muscular
Term
The seminal vesicle has ____ membrane containing ____ glands.
Definition
Mucous; Tubular
Term
The neck of the vesicular gland dips beneath the ____.
Definition
Prostate gland
Term
What part(s) of the prostate gland does the horse have?
Definition
Body (no pars disseminata)
Term
Describe the prostate gland. Where does it lie?
Definition
Discrete, compact, lying across neck of UB & beginning of pelvic urethra; Obvious lobulation present
Term
What connects the L & R lobes of the prostate?
Definition
Isthmus
Term
Describe the isthmus of the prostate.
Definition
Flimsy; overlies terminal parts of vesicular glands & ducti deferenta
Term
The prostate is ____ to the pelvic urethra.
Definition
D
Term
Equine prostate gland is next in relative size to that of _____.
Definition
Carnivores
Term
Prostate: Up to ____ ducts, opening separately on either side of the ______.
Definition
20; Seminal Colliculus
Term
What is the shape of the bulbourethral gland?
Definition
Oval
Term
Where is the bulbourethral gland?
Definition
D end of pelvic urethra (as it turns around the ischial arch); (end of pelvic/beginning of penile urethra)
Term
Describe the bulbourethral gland.
Definition
Small; completely covered by bulboglandularis m.
Term
The bulbourethral gland has ___ ducts opening into the ___ part of the urethra.
Definition
6-8; D
Term
What are the parts of the urethra?
Definition
Pelvic & Extrapelvic (Spongiose)
Term
The pelvic urethra is a direct, non-demarcated continuation of the _____.
Definition
Neck of UB
Term
The D surface of the pelvic urethra is largely covered by ____.
Definition
the Accessory Sex Glands
Term
The urethra is invested, except at the origin, by the ____.
Definition
Urethralis m.
Term
In the internal surface of the stallion's urethra shows a ___ & ___ hillock (the ___).
Definition
M & D; Colliculus Seminalis
Term
What may be seen to open centrally through the seminal colliculus?
Definition
Uterus masculinus
Term
What line the sides of the ejaculatory ducts? How many are there?
Definition
Prostatic Orifices; up to 20
Term
The ducts of the bulbourethral glands are more ____, & on either side of the ____.
Definition
Cd; Median plane
Term
Dorsolaterally, in the same region as the ducts of the bulbourethral glands, there are _____.
Definition
Ducts of the lateral urethral glands (tubuloalveolar glands in the mucosa)
Term
Where does the penis arise from? By what?
Definition
Ischial arch, by L & R crura
Term
What are the 2 main parts of the body of the penis?
Definition
Corpus spongiosum penis & corpora cavernosum penis
Term
Describe the penis.
Definition
Large cylindrical organ ~5cm in diameter; Short when not erect (~45cm)
Term
The _____ penis surrounds the urethra.
Definition
Corpus Spongiosum
Term
How many corpora cavernosum are there?
Definition
2
Term
Where do the corpora cavernosum arise from?
Definition
Tubera ischiadica
Term
The corpora cavernosum penis fuse to form a _____ which is the ____ part of the penis, extending to the tip of the organ.
Definition
Single Corpus; D
Term
the corpus cavernosum penis consists largely of ______ oriented _____ in the ____, w/ large _____ spaces.
Definition
Smooth m.; Longitudinally; Trabeculae; Cavernous 
Term
What type of penis does the horse have?
Definition
Musculocavernous
Term
The penis, due to its ability to expand, increases considerably in both ____ & ___ @ ____.
Definition
Length & Diameter @ Erection
Term
The smooth mm. of the penis are in a state of _____.
Definition
Tonic contraction
Term
What is the function of the tonic contraction of the smooth mm. of the penis?
Definition
Hold penis in prepuce
Term
The smooth mm. of the corpus cavernosum penis are under ____ innervation; erection is due to ____ activity.
Definition
Sympathetic; Parasympathetic
Term
The urethra & corpus spongiosum penis are ___ to the _____ & are outside the ____.
Definition
V; Corpus cavernosum penis; Tunica Albuginea
Term
Does the tunica albuginea enclose the corpus spongiosum?
Definition
No
Term
What type of penis do pigs & ruminants have?
Definition
Fibroelastic
Term
What encloses the corpus spongiosum throughout its length?
Definition
Bulbospongiosus m.
Term
The transverse fibers of the bulbospongiosus m. bridge the _______.
Definition
Urethral Groove
Term
Is the retractor penis m. smooth or striated?
Definition
Smooth
Term
Is the bulbospongiosus m. smooth or striated?
Definition
Striated
Term
Where does the retractor penis m. course?
Definition
The entire V part of the body of the penis
Term
The retractor penis m. dips btw the transverse fibers of the ____, to lie ____ to it, close to the ___ part of the penis.
Definition
Bulbospongiosus m., D, terminal
Term
Comment on the size of the glans penis.
Definition
Enlarged
Term
What is the erectile tissue of the glans penis an extension of?
Definition
Corpus Spongiosum Penis
Term
The erectile tissue of the glans penis caps the ___ end of the ____.
Definition
Distal; Corpus cavernosum penis
Term
How many main parts does the glans penis have? Name them.
Definition
3; Corona Glandis; D Process of the Glans; Collum (Neck) Glandis
Term
What links the corona glandis to the D process of the glans?
Definition
Collum Glandis
Term
The free part of the penis is ___ rather than ___.
Definition
Blunt; Pointed
Term
What is the terminal part of the penis?
Definition
Glans Penis
Term
Does the horse have an os penis?
Definition
No
Term
The urethra ends as the ____.
Definition
Cylindrical Urethral Process
Term
What recess surrounds the urethral process?
Definition
Fossa Glandis
Term
Where does the urethral process project?
Definition
Only a little beyond the glans
Term
What is the D diverticulum of the fossa glandis?
Definition
Urethral Sinus
Term
What part of the penis may contain smegma/the bean?
Definition
Urethral Sinus
Term
Do the pig & dog have a urethral process?
Definition
No
Term
What is smegma?
Definition
Desquamated epithelial cells, dirt, bacteria, fat
Term
What does "the bean" present like?
Definition
Colic
Term
What is a characteristic equine feature of the prepuce?
Definition
2 folds (1 telescoping into the other)
Term
The inner fold of the prepuce is the _____, w/ ____ as orifice.
Definition
Preputial fold; Preputial Ring
Term
Which preputial fold is extra/not seen in other domestic species?
Definition
Inner/Preputial
Term
Which preputial fold has the main opening? What is it called?
Definition
Outer; Preputial Orifice
Term
What is the usual orifice in the prepuce of all species?
Definition
Preputial orifice
Term
What happens to the preputial folds at erection?
Definition
Both pulled over elongated shaft of penis
Term
What is the function of the Cr & Cd preputial mm?
Definition
Cr: Protract; Cd: Retract the prepuce
Term
What animal has the best developed preputial mm?
Definition
Bull
Term
Does the stallion have preputial mm?
Definition
no
Term
What is the main blood supply to the penis? (What does it come from?)
Definition
a. of the penis (from internal pudendal a.)
Term
The internal pudendal a. is a branch of the ____.
Definition
Internal iliac a.
Term
What are the 3 br's of the a. of the penis?
Definition
Deep a. of the penis, D a. of the penis, a. of the bulb
Term
Where does the deep a. of the penis go?
Definition
To the erectile tissue (corpora spongiosum & cavernosum) @ the root of the penis
Term
Where does the D a. of the penis go?
Definition
to the D surface of the penis
Term
Where does the a. of the bulb go?
Definition
To the bulb
Term
What are the 3 aa. that supply the penis?
Definition
a. of the penis, obturator a., external pudendal a.
Term
Which artery supplying the penis is an equine peculiarity?
Definition
External Pudendal a.
Term
The external pudendal a. provides the _____ in the stallion.
Definition
Cr a. of the penis
Term
Venous drainage is usually @ the ___ of the penis.
Definition
Root
Term
What vv. drain the penis in most species?
Definition
Internal Pudendal v. (--> Internal Iliac v.)
Term
What vv. drain the penis in the horse?
Definition
Internal pudendal v., Major v. of the external pudendal v. (-->Ext iliac); Obturator v. (--> Int Iliac)
Term
Where does the external pudendal v. pass?
Definition
Through the origin of the gracilis m. & pectineus m.
Term
Only a small division of the external pudendal v. passes through the ____.
Definition
Inguinal Canal
Term
What happens to the external pudendal v. during breeding?
Definition
Abduction of the hind limbs stretches the mm., constricting the v.
Term
In non-equine mammals, does the ext. pudendal v. drain the penis? Where does it pass?
Definition
No; Entirely through the inguinal canal
Term
Does the obturator v. pass through the m?
Definition
No
Term
@ erection, what happens to venous return?
Definition
Impeded to sustain erection
Term
What a. supplies the prepuce?
Definition
D a. of the penis
Term
What v. drains the prepuce?
Definition
D v. of the penis
Term
Deep inguinal lnn. send efferents to ____.
Definition
Medial iliac lnn.
Term
What are the main lnn. draining the hindquarters?
Definition
Medial iliac lnn.
Term
What must be done to remove a mummified fetus?
Definition
Cesarian section
Term
Where are the ovaries located?
Definition
Sublumbar (under L4 or 5) close to abd roof
Term
Describe the mesovarium.
Definition
Thick, Long, Mobile
Term
Describe the equine ovary.
Definition
Very large (largest & longest among domestic species), up to 9cm diameter @ estrus
Term
What is the shape of the ovary?
Definition
Bean/kidney-shaped w/ marked concavity on V (non-peritoneal) side
Term
What is the depression in the ovary? (Equine peculiarity)
Definition
Ovulation/Ovarian Fossa
Term
Where are the ovarian follicles?
Definition
w/i the deep substance of the ovary (not the cortex, like other spp)
Term
Describe mature ovarian follicles.
Definition
Only project slightly on ovarian surface, yet up to 7cm in diameter & containing 50-80mL of fluid
Term
When does a new set of follicles develop?
Definition
At ~40 days of pregnancy
Term
What is formed & persists until ~150 days of pregnancy?
Definition
Secondary corpora lutea
Term
Describe pregnancy after 150 days.
Definition
Maintained in the absence of corpora lutea
Term
Describe the ovarian bursa.
Definition
Shallow peritoneal pocket
Term
What is the ovarian bursa bounded by?
Definition
Proper lig. of the ovary & peritoneum medially, Mesosalpinx laterally, Ovary + Mesosalpinx Cr, Uterine Horn Cd
Term
Where is the opening of the ovarian bursa?
Definition
V (into peritoneal cavity)
Term
What is another name for the fallopian tube?
Definition
Uterine Tube; Oviduct
Term
Describe the oviduct.
Definition
Fimbriated, funnel-shaped end
Term
What is the funnel-shaped end of the uterine tube?
Definition
Infundibulum
Term
What portions of the oviduct are coiled?
Definition
Ampulla & Isthmus
Term
Where is the oviduct fimbriated?
Definition
Cr end
Term
How does the oviduct join the uterine horn? (Where?)
Definition
Abruptly, at a sphinctered papilla (at uterotubal junction)
Term
The mucosa of the oviduct is thrown into _____; also ____ & ____.
Definition
Longitudinal folds; secondary & tertiary folds
Term
What is the Cr oviduct called?
Definition
Ampulla
Term
What is another name for the uterine horn?
Definition
Cornu
Term
Where is the uterine horn?
Definition
Abd/Peritoneal Cavity
Term
Describe the uterine horns
Definition
Flattened T-shape arrangement, oviductal end rounded & blunt; Relatively short
Term
How is the uterine horn suspended?
Definition
Sublumbar by broad ligs
Term
The broad lig. has remnant of _____ laterally.
Definition
Round lig. of the uterus
Term
What happens to the uterine horn after pregnancy/parturition?
Definition
--> more into abd cavity
Term
Describe the mucosa of the uterine horn.
Definition
Uniform w/ certain slightly raised areas or rings (endometrial cups)
Term
When do endometrial cups appear more obvious?
Definition
Early pregnancy
Term
What is attributed to the endometrial cups?
Definition
Localized endocrine function
Term
What is the brown material of varying sizes floating in the amnion or allantois?
Definition
Hippomanes
Term
Where are hippomanes?
Definition
Amnion or Allantois
Term
What is the function of hippomanes?
Definition
Unknown
Term
What other animals are hippomanes found in?
Definition
Ox, Sheep, Pig (Mostly Horse)
Term
Describe the uterine body
Definition
Almost as long as uterine horns (longest in horse); Large capacity
Term
Where is the uterine body located?
Definition
Abd & pelvic placement, in part
Term
Where does the fetus lie in the pregnant mare?
Definition
In one uterine horn & the body of the uterus
Term
What happens occasionally in the pregnant mare w/ the fetus?
Definition
Carried in the body & both uterine horns equally (transverse presentation)
Term
Uterine horns gradually move ____ w/ gestation, until they come close to the ___ & ___.
Definition
Cr; Xiphoid Cartilage & Diaphragm
Term
What is another name for the neck of the uterus? Where is it located?
Definition
Cervix uteri; btw cervix & vagina
Term
Describe the cervical canal.
Definition
Straight w/ longitudinal folds lining it; Easy to catheterize
Term
The vaginal part of the cervix uteri is _____, hence conspicuous _____, w/ ____ folds.
Definition
Rounded; Annular Vaginal Fornix; Radial
Term
What are the radial folds of the cervix uteri continuous with?
Definition
Mucosal folds lining the cervical canal
Term
What is the rose bud?
Definition
Vaginal fornix not yet @ estrus
Term
What is the rounded vaginal part of the annular vaginal fornix?
Definition
Portio vaginalis
Term
What is the wilted rose?
Definition
The annular vaginal fornix at estrus
Term
What part of the vagina is intraperitoneal?
Definition
Cr
Term
Where is the vagina located?
Definition
Pelvic Cavity
Term
Describe the vagina.
Definition
Capacious cavity, lined by mucus membrane thrown into longitudinal folds (continuous w/ those of the cervix)
Term
What part of the vagina is retroperitoneal?
Definition
Cd
Term
What is the vestibule bounded by?
Definition
Labia of vulva, caudally
Term
The Cr border of the vestibule is at the level of the _____.
Definition
Urethral Orifice
Term
What may be at the level of the urethral orifice in the mare?
Definition
Hymen
Term
The vestibule rises ____ from ___ end.
Definition
Craniodorsal; Cd
Term
The external urethral orifice is ____, & predisposed to ____.
Definition
highly dilatable (short urethra); Prolapse
Term
Describe the glans clitoridis.
Definition
Largest in the horse; conspicuous, rounded body
Term
When is the glans clitoridis exposed?
Definition
During micturition
Term
What surrounds or covers the glans clitoridis?
Definition
Fossa Clitoridis
Term
The vestibule has ___ rows of ___ glands.
Definition
2; Vestibular
Term
The lips of the vulva appose to form ____ & ___ commissures.
Definition
Rounded V & Pointed D
Term
In most mammals, the labial commissure lies @ level of ____.
Definition
Pelvic floor
Term
In certain Thoroughbred lines, the _____ labial commissure is elevated to a ___ position.
Definition
D; D
Term
What are consequences of the D labial commissure being elevated to a D position?
Definition
Anus pushed/displaced Cr; Floor of vestibule elevated; Constricture of vulvae becomes inefficient in closing rima vulvae; Fecal Contamination of urogenital tract; Wind-sucking
Term
When D labial commissure is elevated, a combination of several factors lead to _____.
Definition
Inflammation, Infection, Infertility/Sterility
Term
Where is the anus sunken when pushed/displaced Cr?
Definition
Ischiorectal Fossa
Term
What happens when the floor of the vestibule is elevated?
Definition
Poor drainage of urine
Term
Where is the clitoris in the mare? Describe it.
Definition
In clitoral fossa; All parts (esp glans) well-devo in mare
Term
What happens to the clitoris during estrus?
Definition
Protrudes or extrudes periodically ("Winking")
Term
What are the deep & superficial sinuses of the clitoris?
Definition
Clitoral sinuses
Term
How many clitoral sinuses are there in the mare?
Definition
Variable #
Term
What may be harbored in the clitoral sinuses?
Definition
Contagious equine metritis organisms
Term
What is the blood supply to the genital tract of the mare?
Definition
Ovarian a., Uterine a, Vaginal a.
Term
Where does the ovarian a. branch off from?
Definition
Directly from aorta
Term
What are the br's of the ovarian a.?
Definition
Ovarian & uterine
Term
The ovarian br. is ____ in mesovarium.
Definition
Tortuous
Term
What is an equine peculiarity of the ovarian a?
Definition
Divides into several br's ramifying on ovarian surface
Term
Describe the ovarian v.
Definition
Large, but not as complexly & intimately intertwined w/ the a. as in other spp.
Term
Where does the uterine a. derive from?
Definition
External iliac a (Rarely internal iliac)
Term
What is the MAIN blood supply to the uterus?
Definition
Uterine a.
Term
The uterine a. has several br's w/i the _____.
Definition
Mesometrium
Term
What side is incised for C-sections? Why?
Definition
Antimesometrial; Less vascular
Term
Where does the vaginal a. derive from?
Definition
Internal pudendal a.
Term
What does the vaginal a. supply?
Definition
Vagina, Cervix, Cd Uterus, UB, Pelvic Urethra
Term
What supplies the vagina & vestibule, along w/ the vaginal a.?
Definition
Vestibular br of Internal pudendal a.
Term
The vv. are ____ of the aa.
Definition
Satellites
Term
How many mammae does the mare have?
Definition
2
Term
How are the mammae located, relative to e/o?
Definition
Closely associated
Term
Comment on the size of the equine mammae.
Definition
Relatively small
Term
Where are the mammae located?
Definition
Inguinal region, btw the thighs
Term
What is btw the 2 mammary glands?
Definition
Longitudinal (Intermammary) Groove
Term
How are the mammae compressed?
Definition
Mediolaterally
Term
Describe the teat of the mare.
Definition
Conical, bearing 2 teat orifices (2 main duct systems)
Term
Describe the skin of the mammae.
Definition
Has sparse, fine hair, & glistening oily look (sweat glands & sebaceous glands)
Term
How many mammary glands does each mamma have?
Definition
2
Term
What type of mammae does the mare have?
Definition
Simple
Term
Describe the suspensory ligg. of the mammae.
Definition
Elastic M, Fibrous L; less-devo than cow
Term
What is the main blood source to the mammae?
Definition
External pudendal a.
Term
What vv. drain the mammary glands?
Definition
External pudendal v. & Superficial Cd epigastric v.
Term
What is the "milk vein?"
Definition
Superficial Cd epigastric v.
Term
What divides the mammary glands into lobes & lobules?
Definition
Lamellae
Term
What are the lnn. of the mammae?
Definition
Superficial Inguinal/Mammary lnn.
Term
Describe the mammary lnn.
Definition
Several, scattered btw V abd wall & mammary gland
Term
Where do efferents of the mammary lnn. go?
Definition
Deep inguinal lnn.
Term
What is the cutaneous innervation of the mammae?
Definition
L2-4; S2-4
Term
What is the udder parenchyma/substance innervated by?
Definition
Genitofemoral n. (L3+4)
Term
Do the mammae have symp or parasymp innervation?
Definition
Sympathetic only
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