Multiple choice

Eustachian valve is found in _________.

  1. middle ear

  2. internal ear

  3. left ventricle of heart

  4. right atrium of heart

  5. left atrium of heart
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D Correct answer
Explanation

The right upper chamber of the heart (right atrium) receives deoxygenated blood from the body through the vena cava and pumps it into the right ventricle, which then sends it to the lungs to be oxygenated. Eustachian valve lies at the junction of the inferior vena cava and right atrium.

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