Hematopoietic System Embryology 1 Flashcards
1
Q
Angioblasts form from what?
A
Mesoderm
2
Q
Angioblasts form what as they cluster?
A
Blood islands
3
Q
The blood islands fuse together to form what?
A
A primordial vascular network
4
Q
Hemocytoblasts arise from what?
A
Core cells within these islands
5
Q
Blood formation occurs at what week?
A
Week 5
6
Q
What is the allantois?
A
It is part of the yok sac that extends outward into the connecting stalk
7
Q
What is the role of the allantois?
A
It is involved in early blood formation, plays a role in bladder development, and its blood vessels become the umbilical arteries and veins
8
Q
The liver starts hematopoiesis during which week?
A
week 6
9
Q
The fetal spleen takes over hematopoiesis when?
A
week 26 to 28
