drive - foetal and postnatal circulation

Question 1

What does oxygenated blood I the placenta enter the foetus by?

Answer 1

The umbilical vein

Question 2

What happens to the MAJORITY of the newly oxygenated blood in the umbilical vein?

Answer 2

Bypasses the liver and combines with the deoxygenated blood in the inferior vena cava.
Joins with the deoxygenated blood in the superior vena cava.
Empties into the right atrium.

Question 3

Name the arteries by which deoxygenated blood returns to the placenta:

Answer 3

The umbilical arteries

Question 4

Where do the umbilical arteries originate?

Answer 4

Internal iliacs near the bladder

Question 5

What is the function of the ductus arteriosus?

Answer 5

To connect the main pulmonary artery to the proximal descending aorta. This will allow blood to bypass the foetal lungs

Question 6

What occurs and what is the umbilical vein called in new-born babies?

Answer 6

Spontaneous constriction occurs changes to become the ligamentum teres

Question 7

What do the umbilical arteries become in a new born baby

Answer 7

The medial umbilical ligaments

Question 8

10 to 15 hours after birth what does the ductus arteriosus become?

Answer 8

The ligamentum arteriousum.

Question 9

What does the foramen ovale close and become

Answer 9

Fossa ovalis

Question 10

What does the ductus venosus become?

Answer 10

Ligamentum venosum