chapter 3 Flashcards
1
Q
Function of syncytiotrophoblast.
A
- grows into endometrium to contact the blood vessel.
- form lacunar vesicles; to fill with blood.
- produce hCG
2
Q
What is hCG?
A
- glycoprotein stimulating the production of progesterone.
- helps maintain pregnancy until week 8.
3
Q
The extraembryonic mesoderm does what?
A
-lines cytotrophoblast, forms connecting stalk, and the coelom.
4
Q
What can high hCG levels indicate?
A
-multiple pregnancy, hydatidiform mole, gestational trophoblastic neoplasia (choriocarcinoma)
5
Q
What is considered the embryonic period?
A
- 3 to 8 weeks.
- all major organ systems develop
- distinct human appearance at end of week 8
6
Q
gastrulation is what?
A
- establishment of three primary germ layers. (endo, ecto, mesoderm)
- forms the trilaminar embryonic disk.
7
Q
What is the splanchnopleure?
A
-the formation of the embryonic gut tube, from the visceral layer of lateral mesoderm, and the ecdoderm.
8
Q
The bilaminar embryonic disc is?
A
-derived form dorsal epiblast and ventral hypoblast.
