Placenta & Male Repro

Question 0

4 extra embryonic mem

Answer 0

Splanchnopleure: Yolk sac➡️foregut
Somatopleure: amnion & chorion-⛔️bv
Splanchnopleure: allantois➡️hindgut

Question 1

Temp organ made of fetal & maternal tissue (uterus)

Answer 1

Placenta

Fn:

1. Nutr & gas exchange
2. Endocrine: progesterone, gonadotrophin, IFN-t
3. Unique proteins (PAG)

Question 2

Allantois (bv) + chorion

Answer 2

Allantochorion ➡️ placenta

Permits HEMOTROPHE

Question 3

2 major placentas

Answer 3

1. Yolk sac= choriovitelline= omphaloid

2. chorioallantoic= allantoic

Question 4

CA Placenta Classification: maternal tissue

Answer 4

Nondeciduate = noninv (sow & mare)
Deciduate = inv (carnivores)

Question 5

CA Placenta Classification: contact areas

Answer 5

Diffuse: chorion frondosum (sow & mare)
Cotyledonary: localized c.frond➡️caruncles=placetomes (ruminants)
Zonary: c.frond bands (carnivores)

Question 6

CA Placenta Classification: layers

Answer 6

Epi theliochorial (all 6) Hitotrophe impt
Synepi theliochorial (5)
Endo theliochorial (4)
Hemochorial (3)

Question 7

Six layers of nutrient exchange

Answer 7

Uterine endothelium
Ut. CT
Ut. Epi
Chorioallantoic epi
Fetal CT
Fetal endothelium

Question 8

CA Placenta Classification: projections

Answer 8

FVL

Folded: plicae & rugae
Villous: in ut crypts
Labyrinthe: carnivores

Question 9

Nondeciduate
Folded
Epitheliochori
Areola

Answer 9

Porcine placenta

Question 10

Nondeciduate
Diffuse
Villous
Epitheliochorial
Microplacetomes
Endometrial cups
Hippomanes

Answer 10

Equine placenta

Question 11

Nondeciduate/partially
Cotyledonary
Villous
Epitheliochorial

Answer 11

Ruminant placenta

Convex placetomes: cow
Concave placetomes: ewe & doe

Question 12

⛔️10% rule
Deciduate
Zonary
Labyrinth 
ENDOtheliochorial

Answer 12

Carnivore placenta

Question 13

Layers of Carnivore Placenta

Answer 13

Chorioallantois
Labyrinth/lamellae: syntrophoblasts & decidual cells
Spongy layer
Supraglandar layer
Deep glandular layer

Question 14

At periphery of attachment zone turns black/green in dog and cat placentas

Answer 14

Marginal hematomas

Question 15

Viceral & parietal laminae of TESTIS

Answer 15

Tunica Vaginalis

Question 16

Stroma of TESTIS, white DICCT

Answer 16

Tunica albuginea & tunica vasculosa
Septula
Mediastinum: rete testis

Question 17

Parenchyma of the testis

Answer 17

CSRE

Convoluted seminiferous tubules: (somatic & germ cells)
Straight st (stallion)
Rete testis
Eff ductules

Question 18

Peritubular cells, diploid
Flat nuclei & contractile properties
Help rel sperm to lumen

Answer 18

Myoid cells

Question 19

Spermatogenesis

Spermatogonia➡️spermatozoa

Answer 19

Spermatocytogenesis: spermatogonia A& B➡️prim spermatocyte (ds diploid)
Meiosis: diploid➡️ ds haploid
Spermiogenesis: ss haploid morphogen

Question 20

Spermiogenesis

Answer 20

ACFR

Acrosome cap
Chromatin condense ⛔️pyknotic
Flagellum form from 1 centriole
Residual body= excess cytoplasm

Question 21

Oval nuclei, cytoplasm spans length of seminiferious epi

Fn: support/nutrients, phagocytosis, secrete ABP/inhibin/estrogen

Answer 21

Sertoli cells

Sir Toli

Question 22

Tight junctions ➡️ basal + adluminal compartments

Fn: protect cells (except spermatogonia A)

Answer 22

Blood-Seminiferous Tubular Barrier

B-STB