pregnancy and fetal development

Question 1

types of placental attachments

Answer 1

diffuse
cotyledonary
zonary
discoid

Question 2

what type of placenta have necrotic tips

Answer 2

diffuse

Question 3

what do necrotic tips do

Answer 3

prevent transport of hormones between fetus’

Question 4

shape of cow cotyledon

Answer 4

convex

Question 5

shape of ewe cotyledon

Answer 5

concave

Question 6

epitheliochorial fetal attachment

Answer 6

shallow
-fetal tissue only invades epithelial cells

Question 7

what animals have epitheliochorial fetal attachment

Answer 7

horse
pigs
ruminants

Question 8

endotheliochorial fetal attachment

Answer 8

mid range depth
-fetal tissue attaches to uterine connective tissue

Question 9

what animals have endotheliochrial fetal attachment

Answer 9

cats and dogs

Question 10

hemochorial fetal attachment

Answer 10

most invasive
-fetal tissue invades maternal blood supply

Question 11

what animals have hemochorial fetal attachment

Answer 11

humans

Question 12

what animals have diffuse placental attachment

Answer 12

horse
pigs

Question 13

what animals have cotyledonary placental attachment

Answer 13

ruminants

Question 14

what animals have zonary placental attachment

Answer 14

cats
dogs

Question 15

what animals have discoid placental attachment

Answer 15

human

Question 16

chorion

Answer 16

outermost embryonic membrane that develops the villi to form sites of attachment

Question 17

allantois

Answer 17

-extraembryonic membrane that serves as receptacle for fetal urine
-gas exchange

Question 18

amnion

Answer 18

-membrane closest to the fetus and protects it
-nutrient exchange

Question 19

yolk sac

Answer 19

-nourishment
-gas exchange
-blood cell production

Question 20

whats formed from the yolk sac

Answer 20

-umbilical cord
-blood cells
-reproductive organs

Question 21

size of cow fetus at certain months

Answer 21

2 months-mouse
3 months-rat
4 months-small cat
5 months-large cat
6 months-beagle