Fetal Circulation Notes

which organ systems in the fetus are nonfunctional

respiratory digestive urinary lymphatic

what organ provides for their funcitons before birth

placenta

which blood vessel takes red blood from the umbilical vein to the inferior vena cava

ductus veriosus

list the two bypasses of the lungs

foramen ovale, ductus arteriosus

how many umbilical arteries are there

2

umbilical arteries branch off what other artieries

internal iliac artery

do the umbilical arteries carry red mixed or blue blood

mixed

where do the umbilical arteries take the blood

to the placenta

how many vessels are in the umbilical cord

3

is lung compliance high or low during the first breaths

low

before birth the pressure in the right atrium is higher than in the left atrium. after birth which side has high pressure

left

what happens at birth because of this pressure changne

the foramen ovale closes

what causes the ductus arteriosus to close

higher oxygen availability after birth enables the smooth muscle inits wall to constrict

what does the ductus arteriosus become after birth

ligamentum arteriosum

what does the umbilical vein become

round ligament of liver