Biology

Fetal bypass shunts _____ and blood flow to the placenta is stopped. close

The Ductus Arteriosus allows for what? allows blood pumped into pulmonary trunk to flow directly into aorta – allows blood to bypass pulmonary circulatory system

Ductus Arteriosus short vessel that runs from top of pulmonary trunk (at its bifurcation) to the bottom of the overlying arch of aorta

The Forman Ovale allows for what? allows venous return blood coming into right atrium to pass directly into left atrium – allows blood to bypass pulmonary circulatory system

Foramen Ovale – an opening through the interatrial wall

Two Fetal Shunts – Foramen Ovale – Ductus Arteriosus

Since fetal lungs are not required for gas exchange, the majority of circulating blood by-passes the lungs via _____ _____ _____. two fetal shunts

Umbilical vein enters fetal body via umbilicus, then runs superiorly to enter liver. Between umbilicus and liver, the umbilical vein runs within the inferior margin of the falciform ligament (mesenteric structure spanning from anterior body wall to liver)

From the placenta, blood returns to fetus in umbilical cord via a single _____ _____. umbilical vein – carries well oxygenated blood

Umbilical arteries exit fetal body at _____ and run within _____ _____ to placenta. umbilicus; umbilical cord