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Fetal Circulation

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Questions and Answers

What is the purpose of the ductus venosus in fetal circulation?

To connect the umbilical vein to the IVC (correct)

To regulate blood flow to the lungs

To carry mostly deoxygenated blood

To prevent the liver from taking all the oxygenated blood

What is the function of the foramen ovale in fetal circulation?

To maintain equal mass in the right and left ventricles (correct)

To regulate blood flow to the liver

To protect the lungs against circulatory overload

To carry oxygen-saturated blood to the fetal heart

What is the oxygen saturation level of the blood carried by the ductus arteriosus?

Less than 50%

More than 65%

52-55% (correct)

60-62%

What is the function of the ductus venosus in the fetal circulation?

It carries mostly oxygenated blood Signup and view all the answers

What is the purpose of the ductus arteriosus in the fetal circulation?

To protect the lungs against circulatory overload Signup and view all the answers

Why do the right and left hearts have ventricles of approximately equal mass in fetal circulation?

They effectively pump against the same afterload Signup and view all the answers

Study Notes

Fetal Circulation

The ductus venosus directs oxygen-rich blood from the placenta to the heart, bypassing the liver.

Foramen Ovale

The foramen ovale allows oxygenated blood from the placenta to flow directly from the right atrium to the left atrium, bypassing the lungs.

Ductus Arteriosus

The ductus arteriosus connects the pulmonary artery to the aorta, allowing oxygen-poor blood to bypass the lungs and flow directly to the body.
The oxygen saturation level of the blood carried by the ductus arteriosus is low.

Fetal Heart Development

In fetal circulation, the right and left hearts have ventricles of approximately equal mass because both ventricles pump blood through the body.

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Description

Test your understanding of the shunts in the fetal circulation with this informative quiz. Learn about the ductus venosus, a blood vessel that connects the umbilical vein to the IVC and regulates blood flow. Discover the function of the foramen ovale, which ensures that both sides of the fetal heart pump against equal afterload. This quiz is perfect for medical students and anyone interested in learning about fetal circulation.