Lecture 3 P 2

Question 1

The bilaminar disk splits the environment into what two cavities

Answer 1

The hypoblast And epiblast

Question 2

The hypoblast is facing

Answer 2

The blastocele

Question 3

The blastocele becomes the

Answer 3

Primitive yolk sac

Question 4

The epiblast is facing

Answer 4

Amniotic cavity

Question 5

The amniotic cavity will eventually surround _____

Answer 5

The embryo

Question 6

The __________ is visible within the gestational sac

Answer 6

Amniotic membrane

Question 7

The amnoitic membrane will eventually fuse with

Answer 7

Chorionic walls of the gestational sac

Question 8

Blastocele becomes

Answer 8

Primitive yolk sac

Question 9

Part of the primary YS will pinch off leaving

Answer 9

Secondary YS

Question 10

What does the YS do

Answer 10

Provides nourishment to the conceptus

Produces embryos first blood cells

Question 11

The entire bilaminar disk is surrounded by

Answer 11

Trophoblastic cells

Question 12

Trophoblastic cells will form the

Answer 12

Chorion

Question 13

What does the chorion do

Answer 13

Will provide hCG to support corpus luteum

Will form part of the placenta

Question 14

The space within the chorion is

Answer 14

The chorionic cavity

Question 15

The chorionic cavity will be

Answer 15

Your visible gestational sac

Question 16

As it develops the chorion projects _____ into the surrounding ________, completely surrounding the ______

Answer 16

Villi

Decidua

Blastocyst

Question 17

The chorion will differeniate into 2 zones

Answer 17

Chorion leave (smooth)
Chorion frondosum (villous)

Question 18

On the side of the decidua capsularis the villi will degenerate leaving the

Answer 18

Smooth chorion aka chorion leave

Question 19

On the side of the decidua basalis the villi will

Answer 19

Proliferate and this is villious chorion aka chorion frondosum

Question 20

The chorion frondosum will become the

Answer 20

Embryonic portion of the placenta

Question 21

The chorion frondosum will develop large _____ where ________

Answer 21

Intervillous spaces where maternal blood will be flooded to provide nutrients

Question 22

Eventually the fetal potion of the placenta occupies

Answer 22

Almost all of decudua basalis, leaving only basal layer intact

Question 23

The chorion frondosum and decidua basalis will form

Answer 23

The fetal and maternal components of the placenta

Question 24

In addition to hCG, placenta begins to secrete ____ and _____ leading to the degeneration of _______-

Answer 24

Estrogen and progesterone

CL

Question 25

For utero-placental circulation the intervillous spaces will receive blood from _____ and darined by ____

Answer 25

Endometrial spiral arteries

Drained by : endometrial veins which are branches of uterine veins

Question 26

For feto-placental circulation (fetal aspect) how is blood supplied

Answer 26

The umbilical cord will develop fetal capillaries which extend i nto the terminal villi

Question 27

For feto-placental circulation the umbilical cord develops until ____th week

Answer 27

6th

Question 28

For feto-placental circulation umbilical cor contains

Answer 28

2 arteries (deoxygenated blood)
1 vein (oxygenated blood)