Fetal Circulation

Question 1

Mixing of saturated blood with unsaturated blood occurs in

Answer 1

In the liver
In the superior vena cava
In right atrium
In left atrium
The entrance of the ductus arteriosus into the descending aorta

Question 2

In the adult, the obliterated ductus arteriosus forms the

Answer 2

ligamentum arteriosum.

Question 3

Classic examples of cardiovascular teratogens include

Answer 3

rubella virus and thalidomide.

Question 4

I.Before birth, blood from the placenta, (about 80% saturated with oxygen) returns to the fetus by the

Answer 4

Umbilical vein

Question 5

II.most of this blood flows through the ……… directly into the ………

Answer 5

Ductus venousus
Inferior vena cava

Question 6

Distal parts of the umbilical arteries for the ……..and the proximal portions remain open as …….

Answer 6

medial umbilical ligaments

superior vesical arteries