When blood flows from the bicuspid valve, is it oxygenated?

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Yes. When blood flows through the bicuspid valve, it is oxygenated. Blood flows through the bicuspid valve into the left ventricle after the left atrium receives oxygen-rich blood from the pulmonary veins.

The complete path of blood through a four chambered heart is as follows:

  • The superior and inferior venae cavae and the coronary sinus deliver oxygen-poor blood that has been used by the cells back to the right atrium.
  • The right atrium pumps this oxygen-depleted blood through the tricuspid valve to the right ventricle.
  • The right ventricle then pumps the blood into the right and left pulmonary arteries.
  • The pulmonary arteries transport the blood to the lungs, where the blood becomes oxygenated.
  • The oxygenated blood is brought back to the heart via the pulmonary veins.
  • The pulmonary veins enter the left atrium.
  • The oxygen-rich blood flows through the bicuspid (mitral) valve into the left ventricle.
  • The left ventricle then pumps the oxygenated blood to the body via the aorta.  


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