Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BMS150 Midterm 2 > Embryology 3 - The Early Fetal-Maternal Circulation > Flashcards

Embryology 3 - The Early Fetal-Maternal Circulation Flashcards

1
Q

By the 4th week, what has the growth of the embryo and chorion resulted in?

A

Diffusion of nutrients between the embryo and endometrium being INADEQUATE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What day does the embryonic heart begin to beat?

A

Day 21

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are present in the embryo by day 21?

A

Blood vessels and RBCs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What two things does maternal-fetal circulation depend on?

A
  1. Fetal cardiovascular system
  2. Structures in endometrium that allow exchange to happen
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are primary chorionic villi composed of?

A

Cytotrophoblasts surrounded by synctiotrophoblastic shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are secondary chorionic villi composed of?

A

Extraembryonic mesenchymal core surrounded cytotrophoblastic AND syncytiotrophoblastic shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

When are tertiary chorionic villi present?

A

By the end of week 3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Because of tertiary chorionic villi, fetal blood can now exchange blood with maternal _______ through the membrane formed by the villus

A

Lacuna

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

As the villi develop, what is formed as the cytotrophoblast proliferates and extends through the syncytiotrophoblast layer?

A

Cytotrophoblastic shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the function of the cytotrophoblastic shell?

A

Anchors the chorionic sac and attaches it to the endometrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is an anchoring villus?

A

villus that attaches to endometrium via cytotrophoblastic extensions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

That is the endometrium in a pregnant woman?

A

decidua

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the 3 separate areas of the decidua?

A
  1. Decidua basalis
  2. Decidua capsularis
  3. Decidua parietalis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The decidua that forms the placenta, thats connected to the embryo by the umbilical cord?

A

Decidua basalis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The decidua that doesn’t include the basalis, but is still associated with/covers the embryo?

A

Decidua capsularis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Decidua that is formed by the endometrium that is not a part of the embryo (far from implantation site)?

A

Decidua parietalis

17
Q

The chorionic membrane that is associated with the decidua capsularis?

A

Smooth chorion

18
Q

Where is maternal blood found in the pregnant uterus?

A

Intervillous spaces

19
Q

Where does the development of the fetal cardiovascular system begin?

A

Umbilical vesicle and neighbouring connecting stalk

20
Q

When does fetal cardiovascular system begin to develop?

A

Early in the 3rd week

21
Q

What is vasculogenesis?

A

Development of brand new blood vessels from mesoderm

22
Q

What is angiogenesis?

A

sprouting of blood vessels formed by vasculogenesis - connects blood vessels to each other

23
Q

Angioblasts derives from ______ develop specialized regions known as ________

A

Mesoderm; blood islands

24
Q

What is the process of blood islands developing luen and becoming blood vessels called?

A

Vasculogenesis

25
Q

Blood cells are derived from the what of the new vessels?

A

Inner lining (endothelium)

26
Q

Extraembryonically, what do blood cells develop from?

A

Endothelium of allantois and umbilical vesicle

27
Q

Intraembryonically, what do blood cells develop from?

A

Endothelium of dorsal aorta

28
Q

Within the embryo, the formation of angioblastic cords (vasculogenesis) occurs where during gastrulation/nurulation?

A

Mesenchyme

29
Q

The caudal head fold brings the paired heart tubes ______ toward the _______

A

Caudally, toward the umbilical vesicle

30
Q

When do the heart tubes fuse to from a primordial heart tube?

A

At the end of the third week

31
Q

What does the intraembryonic coelom near the heart tube develop into?

A

The Pericardial Cavity

32
Q

Vessel that supplies blood to the embryo and then connects to the umbilical artery and cardinal veins?

A

Dorsal aorta

33
Q

The flow from dorsal aorta to cardinal veins feeds what?

A

Intraembryonic tissues

34
Q

Vessel responsible for Blood flow through the umbilical vesicle?

A

Vitelline artery and vein

35
Q

vessel that returns blood from the tertiary villi back to the embryonic heart?

A

Umbilical vein

BMS150 Midterm 2 (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions