Placental Development EC Flashcards Preview

Evan's Step 1 Prep Material > Placental Development EC > Flashcards

Flashcards in Placental Development EC Deck (12):
1

Inner layer of chorionic villi. Makes cells.

Cytoprophoblast

2

Outer layer of chorionic villi; secretes hCG and HPL

Syncytioprophoblast

3

hCG action

similar to LH
Stimulates corpus luteum to secrete progesterone

4

Fetal component of placenta

Syncytiotrophoblast and Cytotrophoblast

5

Maternal component of placenta

Decidua basalis

Derived from endometrium
Maternal blood in lacunae

6

Gives rise to umbilical arteries (2) and vein (1)

Allantois

7

Duct between bladder and yolk sac
Becomes medial umbilical ligament in adults

Urachus

Yolk sac--> Allantois--> Urachus

8

Urine discharge from umbilicus

Patent urachus

9

Outpouching of bladder

Vesicourachal diverticulum

10

Connects yolk sac to midgut lumen

Vitelline duct (omphalo-mesenteric duct)

(usually obliterated in 7th week)

11

Meconium discharge from umbilicus

Vitelline fistula

12

Partial closure of vitelline duct with patent portion attached to ileum. May have ectopic gastric mucosa --> Melena, periumbilical pain, and ulcer

Meckel's diverticulum

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