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Flashcards in Branchial pouch derivatives Deck (6)
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1

what layer do the branchial pouches come from?

Endoderm

2

1st pouch develops into....?

Develops into:
-middle ear cavity
-eustachian tube
-Mastoid air cells

contributes to the endoderm-lined structures of the ear

3

2nd pouch develops into....?

Develops into:
Epithelial lining of palatine tonsil

4

3rd pouch develops into...?

Dorsal wing:
- develop into INFERIOR parathyroids

Ventral wing:
- develop into THYMUS

5

4th pouch develops into...?

Dorsal wing: develop into SUPERIOR parathyroids

6

Digeorge Syndrome

Aberrant development of 3rd-4th pouches
- no thymus or parathyroids

- T cell deficiency ( thyme aplasia) and hypocalcemia (failure of parathyroid development)
- cardiac defects (conotruncal anomalies: truncus arteriosis and Tetralogy of Fallot)