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Question

(B) The human heart has four chambers: two atria and two ventricles.The opening between the right atrium and the right ventricle is guarded by a valve

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tricuspid valve

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(B) The human heart has four chambers: two atria and two ventricles.The opening between the right atrium and the right ventricle is guarded by a valve formed of three muscular flaps or cusps, which is known as the $tricuspid 	ext{ valve}$.This valve prevents the backflow of blood from the right ventricle into the right atrium during ventricular contraction.The bicuspid valve (mitral valve) is located between the left atrium and the left ventricle.

The opening between the right atrium and the right ventricle is guarded by . . . . . . .

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