Trace the pathway that a drop of blood will take in the fetal circulation traveling from...

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Trace the pathway that a drop of blood will take in the fetal circulation traveling from...

Trace the pathway that a drop of blood will take in the fetal circulation traveling from the placenta to the aorta (trace the three shunts).

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Answer 1

Answer #1

Placenta comprises 2 umbilical arteries and 1 umbilical vein. The umbilical vein which carries oxygenated blood reaches inferior vena cava . Ductus venosus joins the umbilical vein with IVC, thereby bypassing the portal circulation in the liver.

IVC carries oxygenated blood to the right atrium. From right atrium, the blood passes to left atrium through foramen ovale, the opening which present in between the right and left atrium. By foramen ovale, the blood bypasses the lung.

From left atrium, the blood reaches left ventricle. Then blood reaches aorta. The pulmonary artery joins the aorta via ductus arteriosus. This shunt helps to bypass the lung circulation.

From aorta, the blood distributes to different parts of the body. The deoxygenated blood is collected by umbilical arteries, which joins the umbilical cord and delivers the blood to placenta.

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Answer 2

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