Derivatives of Endoderm Flashcards
1
Q
What happens in week 4?
A
The buccopharyngeal membrane ruptures
2
Q
What happens in week 7?
A
Cloacal membrane ruptures
3
Q
What is the fucntion of the yolk sac?
A
Provide nutrition
Hematopoiesis
4
Q
When does yolk sac become redundant?
A
At week 5 when overgrown by embryonic disc
5
Q
Which pharyngeal arches are present on day 24?
A
1 and 2
6
Q
Which pharyngeal arches are present on day 27?
A
1,2,3
7
Q
Which pharyngeal arches are present on week 5?
A
1-5
8
Q
How do the lungs develope?
A
- By day 28, right and left primary bronchial buds present
- Day 30, secondary bronchial buds form
- Day 38, teritary bronchial buds form
