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Histo
Histo Final
58
History
Graduate
12/02/2008

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Cards

Term
Stratum basale
Definition
Single layer of cuboidal or columnar on basal lamina
Term
Stratum Germinativum
Definition
Stratum basale + Stratum spinosum
Term
Where is keratohyalin?
Definition
Stratum Granulosum
Term
What occurs in non-hair skin?
Definition
Stratum Lucidum...contains eledin
Term
What consists of dead, keratinized cells
Definition
Stratum corneum...contains keratin
Term
Stratum disjunctum
Definition
Superficial layer of stratum corneum...constant desquamation
Term
Layers of Dermis
Definition
loose CT papillary (superficial)
dense irregular CT reticular layer (deep)
Term
What does hypodermis contain?
Definition
Adipose tissue as panniculus adiposus
Term
What is hair?
Definition
Flexible keratinzed structure produced by hair follicles
Term
Visible part of hair?
Definition
Hair shaft
Term
Part of hair within the follicle?
Definition
Hair root
Term
Layers of the hair shaft
Definition
Cuticle: single layer of flat keratinized cells
Cortex: Layer of dense compact keratinized cells...has pigment granules
Medulla: Center of hair, filled with cuboidal or flattened cells.
Term
Layers of internal root sheath of hair follicle
Definition
Internal root sheath cuticle: overlapping keratinized cells
Granular epithelial layer: 1-3 layers of ker. cells with trichohyaline
Pale epithelial layer: single layer
Term
What covers the external root sheath
Definition
Glassy membrane
Term
What is the connective tissue directly under hair matrix?
Definition
Dermal papilla
Term
What forms teh hair shaft
Definition
Hair matrix
Term
Arrector pilli muslces: connection, innvervation?
Definition
Connect to CT sheath of the hair follicle and connect to papillary layer of dermis...innvervated by autonomic nerves
Term
Characterization of sinus (tactile) hair follicles
Definition
Blood-filled sinus btw inner and outer layer of the dermal sheath. Has some voluntary control
Term
gland Type of sebaceous gland?
Definition
Simple or compound alveolar glands
Term
Sebaceous gland mode of secretion in hairless areas
Definition
Empty directly onto surface of skin...holocrine mode
Term
Sebaceous gland mode of secretion with hair follicles
Definition
Empty duct to form pilosebaceous canal
Term
Examples of sebaceous glands
Definition
Infraorbital, inguinal and interdigital gland of sheep; preputial and circumanal glands of dog
Term
Sweat (sudoriferous) gland type
Definition
simple coiled tubular gland (apocrine) or simple tubular in merocrine
Term
Two modes of release for sweat gland
Definition
Apocrine and Merocrine
Term
Location of sweat glands
Definition
Apocrine: Throughout most of skin (release abundantly in horse)\
Merocrine: Footpad of dogs and cats; bovine planum nasolabiale and carpal glands of pig
Term
Mammary gland type
Definition
Compound tubulo-alveolar gland
Term
What do mammary glands have during secretion?
Definition
Membrane bound vesicles filled with micelles of milk proteins...will be released into lumen
Term
When do mamary glands let down milk?
Definition
When myoepithelial cells contract in response to oxytocin
Term
Mammary gland duct system
Definition
Intralobular - Simple cuboidal;
Interlobular - stratified cuboidal;
Lactiferous sinus - st. cuboidal;
teat sinus and papillary duct - st. squamous
Term
What digital organs and hoofs are made of
Definition
Hard keratin
Term
Examples of hard keratin
Definition
Hooves of horses, ruminants, and pigs; cornual horns of ruminant; claws or nails of dogs and cats
Term
What are chestnut and ergot made of
Definition
Tubular and intertubular horn
Term
Digital pads made of
Definition
1. highly keratinized hairless epidermis, 2. coiled merocrine glands in the dermis
3. masses of adipose tissues enclosed in collagen and elastic fibers
Term
Layers of the cornea?
Definition
1. Anterior epithelium
2. subvepithelial basement membrane
3. substantia propria
4. posterior limiting membrane
5. posterior epithelium
Term
What is choroid made of
Definition
Dense network of blodds vessels embedded in teh heavily pimgemented connective tissue
Term
Layers of the retina
Definition
1. Pigment epithelium
2. photoreceptive layer
3. external limiting membrane
4. outer nuclear layer
5. outer plexiform layer
6. inner nuclear layer
7. inner plexiform layer
8. ganglionic cell layer
9. optic nerve fiber layer
10. internal limiting membrane
Term
Type of gland is the lacrimal gland
Definition
Compound tubulo-alveolar...serous in ruminants, serous in cats, sero0-mucous in dogs
Term
External ear parts
Definition
auricle (pinna) and external auditory canal
Term
Middle ear
Definition
Auditory ossicles, tympanic cavity, and auditory tube
Term
Internal ear
Definition
Bony labyrinth (perilymph) and membranous labyrinth (endolymph)
Term
What do membranous ampulla of teh semicircular duct contain
Definition
Crista ampullaris...made of sensory epithelium
Term
What are cristae ampullaris, macula utriculi, and macula sacculi responsible for
Definition
Vestibular (balancing) mechanism
Term
What relates to hearing in the ear?
Definition
Spiral organ (organ of Corti)
Term
What are parts of the Spiral organ
Definition
Sensory cells, supportive cells, afferent and efferent nerve terminals, tectorial membrane
Term
How is the trachae different in avians
Definition
Rings are complete and glands are numerous
Term
Lining of primary bronchi in avians
Definition
Pseuodstratified ciliated columnar epithelium w/ goblet cells and intraepithelial mucous glands. (same as in human)
Term
Secondary bronchi lining in avian
Definition
Simple columnar or cuboidal cells and no goblet cells (humans have pseudostratified)
Term
Where does lymph tissue end in the lung of the avian
Definition
At the primary bronchi
Term
Parabronchi lining
Definition
simple cuboidal.
Term
Atria and air capillary lining
Definition
Simple squamous
Term
Lining of air sacs
Definition
Simple squamous or cuboidal epithelium
Term
Paired air sacs
Definition
Cranial thoracic, caudal thoracic, paired abdominal
Term
Unpaired air sacs
Definition
Cervical and clavicular
Term
What type of glands are all salivary glands in the avian
Definition
Branched tubular mucous
Term
What is histological similar to the esophagus
Definition
crop
Term
What is in crop milk
Definition
Desquamated lipid-laden cells
Term
Parts of avian stomach
Definition
Glandular proventriculus and muscular ventriculus (gizzard)
Term
Lining of the ventriculus
Definition
Lined by cuticle (secretory product of mucosal gland)
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