true or false: fetal circulation depends upon: fetal oxygenation of the fetal blood, 3 intrafetal shunts, and the fetal heart to provide blood pressure
true
the fetal lungs are collapsed and posses high vascular resistance. fetal blood is oxygenated in the _____. blood flows entering the placenta is poorly oxygenated, while blood flow leaving the placenta possesses the highest oxygen saturation in the fetal c
placenta
blood flow enters the fetus through the umbilical ____
vein
the blood flow entering the RA from the IVC is _____ in oxygen saturation
high
true or false: both the blood from the SVC and CS are very desaturated
true
true or false: in the intrafetal circulatory shunts, 3 streams jointly flow through the TV, RV, PV and MPA
true
most ______ artery blood flow passes through the ductus arteriosus (3rd fetal shunt), and into the descending aorta
pulmonary
in the fetal heart, the blood flows from the IVC which passed through the foramen ovale into the LA is joined by desaturated blood returning from the _____ via the PV
lungs
in the _____ heart, blood passes through the MV, LV and AoV into the ascending aorta
fetal
the Fetal Circulation includes: placental oxygenation, intrafetal circulatory ____ and the ____ heart
shunts, fetal
in the fetal heart, the ____ receives the most highly saturated blood available
brain
the umbilical ____ carry the deoxygenated blood back to the maternal placenta
arteries
the 3 fetal circulatory shunts are:
foramen ovale
ductus _____
ductus _____
(all normally close after birth)
arteriosus, venosus
with birth, the lungs inflate, ______ pulmonary vascular resistance and right heart pressure, while the left heart pressures _____, resulting in closure of the foramen ovale which becomes the fossa ovalis in the adult
decreasing, increasing
the ductus closes due to a _____ in blood flow across the vessel and becomes the ligamentum venosus
decrease
true or false: during fetal circulation the left and right pulmonary arteries are relatively underdeveloped at birth due to the decrease in the flow volume of blood
true
true or false: during fetal circulation the right hart handles a larger volume of blood than the left heat
true
during fetal circulation the RV pumps against a highly resistant pulmonary bed and arterial bed which means the fetal RV will be thicker?/thinner? the the RV
thicker
true or false: blood enters the systemic arterial fetal system from 2 sources: the ductus arteriosus and the ascending aorta
true
the ductus venosus becomes the ____ _____ in the adult
ligamentum venosum
the _____ _____ closes upon birth due to an increase in oxygen content in the aorta
ductus arteriosus
the oxygenation exchange of CO2 of fetal blood takes place in the maternal _____
placenta
the ____ delivers blood from the umbilical vein to the IVC, thus bypassing the liver
ductus venosus
the ______ valve directs blood entering the RA to the foramen ovale
eustachian
true or false: the shunt between the Ao and the PA in the fetus is right to left
true
the umbilical vein after birth becomes the ligamentum _____
teres
true or false: with birth, the lungs inflate, right atrial, RV and PA pressure decreases and the left heart pressure increases
true
the _____ _____ closes due to an increase in left atrial pressure
foramen ovale
the vessel that shunts fetal blood right to left between the PA and Ao is the ductus _____
arteriosus
in the fetal heart, fetal blood at the atrial level is shunted right to left vi the ____ _____
foramen ovale
all of the following are true statements concerning events that occur after birth except:
a. systemic pressure increases
b. pulmonary vascular resistance increases
c. right heart pressures decrease
d. foramen ovale closes
b
the foramen ovale loses after birth due to an increase in _____heart pressures
left
the ductus arteriosus closes due to an increased _____ pressure
systemic
the ductus venosus closes after birth and becomes the ligamentum ____
arterisum
the umbilical artery after birth becomes the umbilical _____
ligament
the foramen ovale after birth becomes the _____ _____
fossa ovalis
the ductus arteriosus after birth becomes the _____ _____
ligamentum arteriosum