Week 2-3 post fertilzation Flashcards
1
Q
What happens to embryoblasts during 2nd week post-fertilization?
A
they differentiate into 2 cell layers epiblast and hypoblast
2
Q
What is the amniotic cavity and what is is lined by?
A
it is a cavity continuous with epiblasts and lined by amnioblasts
3
Q
What is the primary yolk sac and what is it lined by?
A
it is a cavity continuous with hypoblasts and is lined by the Heuser’s membrane
4
Q
What happens to trophoblasts during 2nd week of development?
A
they differentiate into 2 layers; inner cytotrophoblast and outer syncytiotrophoblast
5
Q
What is the 2nd week of development also known as?
A
the week of 2s
