Fetal Circulation

Question 1

What leads to the umbilical cord, leaves the placenta and carries oxygenated blood to the fetus?

Answer 1

Umbilical vein

Question 2

What carries blood from vein to vein?

Answer 2

Ductus venosus

Question 3

What carries blood from the right atrium to the left atrium?

Answer 3

Foramen ovale

Question 4

What carries blood from artery to artery?

Answer 4

Ductus arteriosus

Question 5

What carries deoxygenated blood and returns it to the placenta?

Answer 5

Umbilical arteries

Question 6

What are the two cardiac shunts?

Answer 6

Foramen ovals and ductus arteriosis

Question 7

What acts as the lungs for the fetus?

Answer 7

The placenta

Question 8

Fetal hemoglobin has a ______ affinity for O2 when compared to maternal hemoglobin?

Answer 8

Greater

Question 9

Most of the blood in the fetus by-passes the what?

Answer 9

Lungs

Question 10

What’s the only vessel in the fetus that carries unmixed blood?

Answer 10

Umbilical vein

Question 11

Blood that used to flow from the ductus arteriosus to aorta now flows to the what?

Answer 11

Lungs

Question 12

Pulmonary blood flow does what?

Answer 12

Increases

Question 13

Pulmonary vascular pressure does what?

Answer 13

Decreases

Question 14

Placenta circulation cuts off when what is cut?

Answer 14

Umbilical cord

Question 15

When the umbilical cord is cut what becomes closed?

Answer 15

Fetal heart shunts

Question 16

When the umbilical cord is cut systemic vascular resistance does what?

Answer 16

Increases

Question 17

When the umbilical cord is cut the right atrial pressure does what?

Answer 17

Decreases

Question 18

Increased pressure in the left atrium stimulates closure of the what?

Answer 18

Foramen ovale

Question 19

Due to higher oxygen saturation what closes in 10-15hrs after birth?

Answer 19

Ductus arteriosus

Question 20

Fetal circulation delivers the highest available oxygen concentration to what?

Answer 20

Head, neck, heart and brain

Question 21

Fetal circulation delivers the lowest amount of oxygen concentration to what?

Answer 21

Abd organs, legs, lower body (neck and below)

Question 22

True or false.

The mother and fetus have the same circulation.

Answer 22

False

Question 23

What 3 structures allow blood to by-pass the fetal liver and lungs?

Answer 23

Foramen ovale, ductus venosus, ductus arteriosus

Question 24

What’s the connection b/t the right and left atrium?

Answer 24

Foramen ovale

Question 25

What’s the connection b/t truncus pulmonalis and the aorta?

Answer 25

Ductus arteriosus

Question 26

Minority of the blood from the head and upper extremities goes through the ________ and empties into the _____ through the tricuspid into the right ventricle and pulmonary artery then into the lungs for nourishment?

Answer 26

Superior vena cava, right atrium

Question 27

Majority of the blood pass from the _______ through the ______ into descending aorta to bypass the lungs then goes to brain?

Answer 27

Pulmonary artery, ductus arteriosus