Fetal Circulation

Question 1

What is fetal circulation

Answer 1

the unique way a developing fetus’s circulatory system functions within the mother’s womb-directed to placenta for oxygenation

Question 2

Ductus Venosus

Answer 2

Allows blood to bypass liver, taking 40-60% of blood flow which allows an increased amount of oxygenated blood to reach heart

Question 3

Foramen ovale

Answer 3

opening in septum betwen L and R atria
allows 50% of to shunt directly to left ventricle

Question 4

Ductus Arteriosus

Answer 4

located between pulmonary trunk and aortic arch, shunts 60% of blood away from pulmonary circulation into systemic atrial arch

Question 5

Umbilical Vein

Answer 5

Carries oxygenated blood from placenta to inferior vena cava
umbilical vein enters fetal liver where it joins portal venous system

Question 6

Umbilical arteries

Answer 6

carry deoxygenated blood from iliac arteries back to placenta

Question 7

oxygenated blood

Answer 7

Right atrium to Left atrium via foramen ovale, Left atrium to left ventricle to ascending aorta
blood sent to brain via carotid and vertebral artieries and to the heart

Question 7

deoxygenated blood

Answer 7

runs from umbilical vein to placenta
Enters Right atrium to Right ventricle, bypasses lungs, crosses arteriosus, moves via descending aiorta to placenta via 2 umbilical arteries.
CO2 and Wastes eliminated into mothers circulatory system.

Question 8

Maternal Vein and Artery

Answer 8

they feed into the intervillous space (pools of maternal blood) and are there for Respiratory function, excretion, nutrition, immunity-antibodies