28. Human Development

Which of the following hormones is NOT produced by the placenta at any point during pregnancy?

The chorion is made up of the:

The chorionic villi 

(a) Form the umbilical cord

(b) Form the umbilical vein

(c) Form the umbilical arteries

(d) Increase the surface area available for exchange between the placenta and maternal blood

(e) Form the portion of the placenta called the capsular decidua

Identify the two extra-embryonic membranes and the three different regions of the endometrium at week 10 of development in the following diagram.

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a. ___

b. ___

c. ___

d. ___

e. ___

The structure(s) that allow(s) active and passive exchange between the fetal and maternal bloodstreams is/are the 

(a) Yolk stalk

(b) Chorionic villi

(c) Umbilical veins

(d) Umbilical arteries

Name the primary placental hormones and their functions.

The umbilical vein carries

(a) waste products to the placenta

(b) oxygen and food to the fetus

(c) oxygen and food to the placenta

(d) oxygen and waste products to the fetus

The placenta is a marvelous, but temporary, organ. Starting with a description of its formation, show how it is an intimate part of both fetal and maternal anatomy and physiology during the gestation period.