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Ch.13/MED 126:

The Vascular System-Fetal Circulation

QuestionAnswer
The site of exchanges of materials between fetal blood and maternal blood is the? Placenta
Name the kinds of materials exchanged between fetal blood and maternal blood: Oxygen-CO2, nutrients, and waste products
Name the mechanism (processes) of exchange between fetal blood and maternal blood: Diffusion and active transport
The fetus is connected to the placenta by the umbilical cord, which contains two ________ and on __________. Umbilical arteries, umbilical vein
The umbilical arteries carry blood from the _______ to the ______. Placenta, fetus
Within the body of the fetus, the umbilical vein branches into two vessels. One branch takes blood to the fetal liver. The other branch is called the _______ and takes blood to the __________, which returns blood to the right atrium of the fetal heart. Ductus venosus, inferior vena cava
Within the fetal heart, the ________ is an opening in the interatrial septum that permits some blood to flow from the ____ atrium to the _____ atrium. Foramen ovale, right, left
Just outside the fetal heart, the ductus arteriosus is a short vessel that permits blood to flow from the _________ to the ______. Pulmonary artery, aorta
State the purpose of the ductus arteriosus? Permits most fetal blood to bypass the lungs
After birth, the ductus venosus dilates/constricts _______ and becomes non-functional. Constricts
The foramen ovale is opened/closed ______ by a flap on the left side, and the ductus arteriosus dilates/constricts _________? Closed, constricts
The umbilical artery has 2 arteries (_______-away from the fetus) and 1 vein (________- toward the fetus.) Deoxygenated, oxygenated
What is the hole between the atria in the interatrial septum called? Foramen ovale
After birth, vessels become nonfunctional and become? Ligaments
Created by: laceylake
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