Lecture 8 placenta Flashcards

1
Q

5 functions of placenta

A
protection
nutrition
respiratory
excretory
endocrine
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

the total nutriment supplied to the embryo

A

embyrotrophe

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

nutriment from endometrial glands

A

histotrophe

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

nutriment from maternal blood

A

hemotrophe

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

components of fetal membrane

A

yolk sac
amnion
allantois
chorion

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

components of the placenta

A

fetal membrane

maternal endometrium

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

cells that surround the blastocyst

A

trophoblast

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

what does trophoblast turn into

A

extra embryonic and fetal membrane

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

ICM turns into

A

amniotic cavity
hypoblast
epiblast

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

what is gastrulation

A

epiblast turning into ectoderm, mesoderm and endoderm

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

term for ectoderm with underlying mesoderm

A

somatopleure

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

folds in somatopleure become ___ and ____

A

amnion and chorion

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

explain amnion

A

part of placenta that directly encases the embryo

-space within called amniotic cavity which is filled with amniotic fluid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is chroion

A

part of placenta that directly interacts with uterus

- made of ectoderm lined by mesoderm

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

the term for amnion fused with allantois

A

mesamnion

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

what is important about mesamnion

A

amnion will rip and stay connected to allantois, baby born not covered in amnion. Cattle and Sheep

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

term for endoderm and mesoderm

A

splanchnopleure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

out pouching of the hindgut that hold excretions from fetus

A

allantois

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

the allantois expands and eventually contacts the chorion and forms the

A

chorioallantois

20
Q

mesoderm is highly vascular and forms the

A

umbilical cord

21
Q

umbilical make up

A

2 arteries

1 vein

22
Q

part of placenta that has direct connection with endometrium of uterus

23
Q

allantois, chorion and endometrium

A

uteroplacental unit

24
Q

when yolk sac and chroion are adjacent

A

chroiovitelline placenta

25
three ways placenta is classified
shape microscopic layers amount of tissue lost
26
describe diffuse
entire surface of chorion is covered in microcotyledon that are microville that project into crypts(microcaruncles) of the endometrium except for over gland openings or cervical star in the horse velvety pig, horse
27
describe cotyledonary
cotyledon on chorion and caruncles on endometrium form placentome very efficient ruminants: cattle. sheep and goats
28
what is the connective structure of the chorion
cotyledon
29
what is the connective structure of the endometrium
caruncle
30
what is chorion and caruncle together
placentome
31
cows have how many placentome
75-125, mushrooms(convex)
32
sheep have how many placentome
80-90, concave
33
shape of placentome in goats
flat
34
describe zonary
band of chorionic fondosum that is in middle of chorionic sac labyrinthine or lamellae structures can form blood clots( green) at borders dogs and cat
35
6 layers of embryo
epitheliochorial
36
example of epitheliochorial
mare and sow ``` fetal vessel fetal mesenchyme trophoblast uterine epithelium uterine mesenchyme uterine vessel ```
37
4 layers of embryo
endotheliochorial
38
endotheliochorial
fetal vessel fetal mesenchyme trophoblast uterine vessel
39
hemochorial
fetal vessel fetal mesenchyme trophoblast bathed in the blood of their mother
40
3 layers of embryo name
hemochorial
41
when maternal epithelium and submucosa are lost at parturition, leaving a denuded endometrium
deciduate
42
deciduate
primates when maternal epithelium and submucosa are lost at parturition, leaving a denuded endometrium
43
indeciduate
mare, sow fetal membranes expelled, endometrium intact
44
fetal membranes expelled, endometrium intact
indeciduate
45
types of shape of placentas
diffuse - mare cotyledonary- cow zonary- dog discoidal- human