Term
| 1st Branchial/Pharyngeal pouch develops into ___ |
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Definition
| middle ear cavity, eustachian tube, and mastoid air cells |
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Term
| 3rd Branchial/Pharyngeal pouch (dorsal wings) develops into ___ |
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Definition
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Term
| 3rd Branchial/Pharyngeal pouch (ventral wings) develops into ___ |
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Definition
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Term
| 4th Branchial/Pharyngeal pouch (dorsal wings) develops into ___ |
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Definition
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Term
| The anterior 2/3 of the tongue is formed from what branchial/pharyngeal arch(es)? |
|
Definition
1st arch
(sensation via CN V3, taste via CN VII) |
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Term
| The posterior 1/3 of the tongue is formed from what branchial/pharyngeal arch(es)? |
|
Definition
3rd and 4th arches
(sensation and taste via CN IX) |
|
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Term
| What nerve supplies motor innervation to the tongue? |
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Definition
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Term
| Thyroglossal duct becomes ___ |
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Definition
Foramen cecum
If it doesn't obliterate, it can form a cyst in the midline of the neck that moves with swallowing. Ectopic thyroid tissue may be in the tongue. |
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Term
|
Definition
Failure of fusion of the maxillary and medial nasal processes.
Cleft palate forms differently (maxillary process is not involved) |
|
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Term
|
Definition
|
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Term
|
Definition
| Duodenum to transverse colon |
|
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Term
|
Definition
| Transverse colon to rectum |
|
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Term
| Cause of duodenal atresia |
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Definition
| failure to recanalize (trisomy 21) |
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|
Term
Embryonic gut rotation:
- what part of gut
- when
- around what
|
|
Definition
- Midgut
- Week 10, after it returns to the abdominal cavity from herniating through the umbilical ring
- around the Superior mesenteric artery |
|
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Term
|
Definition
| extrusion of abdominal contents through abdominal folds, not covered by peritoneum |
|
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Term
|
Definition
Persistence of herniation of abdominal contents into umbilical cord, covered by peritoneum
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Term
| Give the 3 steps to fetal kidney development |
|
Definition
1. Pronephros (later degenerates)
2. Mesonephros (kidney for 1st trimester, then male genital system)
3. Metanephros: 2 parts
- Ureteric bud: everything in kidney after DCT
- Metenephric mesenchyme: filtration system up until DCT
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Term
| What gene on Y chromosome differentiates a fetus into a male? |
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Definition
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Term
| How do Sertoli cells contribute to male fetal formation? |
|
Definition
secrete Anti-mullerian hormone which causes degeneration of the paramesonephric duct (female internal genitalia)
(stop female internal genitalia) |
|
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Term
| How do Leydig cells contribute to male fetal formation? |
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Definition
| Secrete testosterone/androgens which generates the Wolffian/Mesonephric duct development (male internal genitalia), and DHT making male external genitalia |
|
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Term
| femal homologue of the prostate gland |
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Definition
| Urethral and paraurethral glands (Skene's glands) |
|
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Term
|
Definition
Urethral opening on inferior (ventral) side of the penis
from failure of urethral folds to close
(more common than epispadias)
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|
|
Term
|
Definition
Urethral opening on superior (dorsal) side of the penis
from faulty positioning of the genital tubercle
(less common than hypospadias) |
|
|
Term
| Femal equivalent of gubernaculum |
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Definition
| ovarian ligament and round ligament of uterus |
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