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Fetal Circulation
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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?

    <p>It carries mostly oxygenated blood</p> Signup and view all the answers

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

    <p>To protect the lungs against circulatory overload</p> Signup and view all the answers

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

    <p>They effectively pump against the same afterload</p> 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.

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