Chapter 55 The Placenta

Question 1

Fetal membranes include?

Answer 1

chorion, amnion, yolk sac, and allantonis

Question 2

The major functioning unit of the placenta is the _________

Answer 2

chorionic villus

Question 3

lobes of the placenta (approx. 15-20)

Answer 3

cotyledons

Question 4

Forms the fetal part of the placenta

Answer 4

chorion fondosum

Question 5

The nonvillious part of the chorion around the gestational sac.

Answer 5

chorion laeve

Question 6

The fetal structure of the placenta

Answer 6

chorionic plate

Question 7

The maternal surface of the placenta.

Answer 7

basal plate

Question 8

functions of the placenta

Answer 8

respiration, nutrition, excretion, protection, storage, hormonal production

Question 9

Insertion of the umbilical cord at the margin of the placenta within 10mm of the edge.

Answer 9

battleore placenta

Question 10

umbilical cord that inserts on the membranes.

Answer 10

velamertous placenta

Question 11

By ______ weeks the yolk sac has diminished to less than 5mm in diameter.

Answer 11

9

Question 12

Placental implantation within the lower uterine segment.

Answer 12

placenta previa

Question 13

the amnion develops at the _____menstrual day.

Answer 13

28th

Question 14

By week ___ gestation the amnion fuses within the chorion and can no longer be seen as two separate membranes.

Answer 14

16

Question 15

The ________ are the functioning endocrine units of the placenta.

Answer 15

chorionic villi

Question 16

The umbilical cord develops during the first _____ of gestation.

Answer 16

5 weeks

Question 17

The cord is surrounded by a mucoid connective tissue called __________.

Answer 17

Warton’s Jelly

Question 18

The intestines herniate in the proximal umbilical cord at approx. _________

Answer 18

10-12 weeks

Question 19

The Placenta can be identified as early as ________

Answer 19

8 weeks

Question 20

The chorionic villi attaches superficially to the myometrium without muscular invasion

Answer 20

Placenta accreta

Question 21

Further Extension of the chorionic villi into the myometrium.

Answer 21

Placenta increta

Question 22

Penetration of the chorionic villi through the uterus. Most dangerous.

Answer 22

Placenta precreta