Lecture 8 placenta

Question 1

5 functions of placenta

Answer 1

protection
nutrition
respiratory
excretory
endocrine

Question 2

the total nutriment supplied to the embryo

Answer 2

embyrotrophe

Question 3

nutriment from endometrial glands

Answer 3

histotrophe

Question 4

nutriment from maternal blood

Answer 4

hemotrophe

Question 5

components of fetal membrane

Answer 5

yolk sac
amnion
allantois
chorion

Question 6

components of the placenta

Answer 6

fetal membrane

maternal endometrium

Question 7

cells that surround the blastocyst

Answer 7

trophoblast

Question 8

what does trophoblast turn into

Answer 8

extra embryonic and fetal membrane

Question 9

ICM turns into

Answer 9

amniotic cavity
hypoblast
epiblast

Question 10

what is gastrulation

Answer 10

epiblast turning into ectoderm, mesoderm and endoderm

Question 11

term for ectoderm with underlying mesoderm

Answer 11

somatopleure

Question 12

folds in somatopleure become ___ and ____

Answer 12

amnion and chorion

Question 13

explain amnion

Answer 13

part of placenta that directly encases the embryo

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

Question 14

what is chroion

Answer 14

part of placenta that directly interacts with uterus

- made of ectoderm lined by mesoderm

Question 15

the term for amnion fused with allantois

Answer 15

mesamnion

Question 16

what is important about mesamnion

Answer 16

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

Question 17

term for endoderm and mesoderm

Answer 17

splanchnopleure

Question 18

out pouching of the hindgut that hold excretions from fetus

Answer 18

allantois

Question 19

the allantois expands and eventually contacts the chorion and forms the

Answer 19

chorioallantois

Question 20

mesoderm is highly vascular and forms the

Answer 20

umbilical cord

Question 21

umbilical make up

Answer 21

2 arteries

1 vein

Question 22

part of placenta that has direct connection with endometrium of uterus

Answer 22

chorion

Question 23

allantois, chorion and endometrium

Answer 23

uteroplacental unit

Question 24

when yolk sac and chroion are adjacent

Answer 24

chroiovitelline placenta

Question 25

three ways placenta is classified

Answer 25

shape microscopic layers amount of tissue lost

Question 26

describe diffuse

Answer 26

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

Question 27

describe cotyledonary

Answer 27

cotyledon on chorion and caruncles on endometrium form placentome very efficient ruminants: cattle. sheep and goats

Question 28

what is the connective structure of the chorion

Answer 28

cotyledon

Question 29

what is the connective structure of the endometrium

Answer 29

caruncle

Question 30

what is chorion and caruncle together

Answer 30

placentome

Question 31

cows have how many placentome

Answer 31

75-125, mushrooms(convex)

Question 32

sheep have how many placentome

Answer 32

80-90, concave

Question 33

shape of placentome in goats

Answer 33

flat

Question 34

describe zonary

Answer 34

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

Question 35

6 layers of embryo

Answer 35

epitheliochorial

Question 36

example of epitheliochorial

Answer 36

mare and sow ``` fetal vessel fetal mesenchyme trophoblast uterine epithelium uterine mesenchyme uterine vessel ```

Question 37

4 layers of embryo

Answer 37

endotheliochorial

Question 38

endotheliochorial

Answer 38

fetal vessel fetal mesenchyme trophoblast uterine vessel

Question 39

hemochorial

Answer 39

fetal vessel fetal mesenchyme trophoblast bathed in the blood of their mother

Question 40

3 layers of embryo name

Answer 40

hemochorial

Question 41

when maternal epithelium and submucosa are lost at parturition, leaving a denuded endometrium

Answer 41

deciduate

Question 42

deciduate

Answer 42

primates when maternal epithelium and submucosa are lost at parturition, leaving a denuded endometrium

Question 43

indeciduate

Answer 43

mare, sow fetal membranes expelled, endometrium intact

Question 44

fetal membranes expelled, endometrium intact

Answer 44

indeciduate

Question 45

types of shape of placentas

Answer 45

diffuse - mare cotyledonary- cow zonary- dog discoidal- human