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Repro > Placentation > Flashcards

Placentation Flashcards

1
Q

Placenta

A

Organ formed in the uterus during pregnancy that contains BOTH fetal and maternal tissue

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2
Q

Functions of placenta

A

Nutrient exchange, gas exchange, stores waste, protective, endocrine organ

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3
Q

Yolk sac

A

Early fetal nutrition

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4
Q

Amnion

A

Protection, waste, nutrient exchange

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5
Q

Allantois

A

Blood supply for chorion, waste

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6
Q

Chorion

A

Maternal interface, nutrient and gas exchange

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7
Q

Diffuse placenta

A

Maternal/fetal contact throughout placenta

Ex: horse, pig

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8
Q

Cotyledonary placenta

A

Maternal/fetal contact through specialized areas called placentomes

Ex: cow, sheep, goat

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9
Q

Placentome

A

Maternal caruncles + fetal cotyledons

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10
Q

Zonary placenta

A

Maternal/fetal contact primarily in belt-like area encircling conceptus

Ex: dog, cat

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11
Q

Discoid placenta

A

Maternal/fetal contact in one or two round areas

Ex: primates, rodents

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12
Q

Epitheliochorial placenta

A

Chorion opposed to maternal epithelium, least invasive

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13
Q

Species with epitheliochorial placentas

A

Horse, pig, cow, sheep, goat

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14
Q

Endotheliochorial placenta

A

Fetal tissue invades through maternal epithelium and a layer of connective tissue

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15
Q

Species with endotheliochorial placenta

A

Carnivores (dog, cat)

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16
Q

Hemochorial placenta

A

Fetal tissue invades through maternal epithelium, connective tissue, and endothelium

Direct contact with maternal blood

17
Q

Species with hemochorial placenta

A

Primates, rodents

18
Q

Ruminant epitheliochorial placenta

A

Binucleate giant cells in sheep and goats can fuse with maternal epithelium to form syncytium

19
Q

Non-deciduate/adeciduate placenta

A

No maternal tissue loss during birth

20
Q

Deciduate placenta

A

Endometrial loss during birth

21
Q

Species with non-deciduate placenta

A

Horse, pig, ruminants

22
Q

Species with deciduate placenta

A

Carnivores, humans, rodents

23
Q

Placentation in mare

A

Diffuse, epitheliochorial, adeciduate, with microcotyledons

24
Q

Placentation in sow

A

Diffuse, epitheliochorial, adeciduate, with folds

25
Q

Placentation in ruminants

A

Cotyledonary, epitheliochorial, adeciduate

26
Q

Placentome shape in cow

A

Convex

27
Q

Placentome shape in ewe/goat

A

Concave

28
Q

Placentation in carnivores

A

Zonary, endotheliochorial, deciduate

29
Q

How can you have green puppies?

A

Marginal hemotomas containing hemoglobin turn green during parturition

30
Q

Placentation in primates

A

Discoid, hemochorial, deciduate

31
Q

Placental interdigitation in the pig

A

Folded type

32
Q

Placental interdigitation in the horse

A

Lamellar type

33
Q

Placental interdigitation in the cow

A

Villous type

34
Q

Placental interdigitation in the dog

A

Labyrinthine type

Repro (13 decks)

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