Fetal Circulation Before Birth

where does oxygenated blood originate from

umbilical veins

what is the purpose of umbilial veins

transport oxygenated blood from the placenta to the liver

what is the purpose of/what is the ductus venouses

act as a shunt between the umbilical vein and IVC

what is the foramen ovale

a shunt between the atria that allows blood to travel from RA to LA

what is the ductus arteriousus

duct between thhe pulmonary artery and aorta

what does the umbilical artery do

transport oxygenated blood from the aorta to the fetus

what does the right atrium contain

partially oxygenated blood from the IVC and deoxgenated blood from the SVC

what does the left atrium contain

blood from the RA and the pulmonary veins

how does gas exchange in fetus in utero differ to a baby

high resistance in the lungs and low resistance in the placenta means most gas exchange occurs in the placenta

why is resistance high in the lungs

the alveoli are filled with fluid