3 Flashcards
1
Q
What does the notochord become in adults?
A
Nucleus pulposus of the intervertebral disks.
2
Q
What are the 2 germ layers in wk 2?
A
hypoblast and epiblast
3
Q
What forms the primitive streak?
A
Invagination of the epiblast (precursor to ectoderm)
4
Q
What are the 2 cavities in wk 2?/
A
yolk sac, amniotic cavity
5
Q
2 componenets of the placenta in wk 2?
A
cytotrophoblast and syncytiotrophoblast
6
Q
3 germ layers in wk 3?
A
ectoderm, mesoderm, endoderm
7
Q
What is the rule of 4’s for week 4?
A
4 chambers of heart
4 limb buds
8
Q
What embryological tissue does the adenohypophysis come from?
A
Surface ectoderm
9
Q
What embryological tissue does the neurohypophysis come from?
A
Neuroectoderm
10
Q
What embryonic tissue are melanocytes and parafollicular cells of thyroi derived from?
A
neural crest
