Home Biology Body Fluids and Circulation A specialized nodal tissue embedded in the l…
Biology Body Fluids and Circulation Single Correct MCQ
Published on: August 20, 2026

A specialized nodal tissue embedded in the lower corner of the right atrium, close to atrio-ventricular septum, delays the spreading of impulses to heart apex for about 0.1 second. The delays allows

A
blood to enter aorta
B
the ventricles to empty completely
C
blood to enter pulmonary arteries
D
the atria to empty completely

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The correct answer is:
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Atrio-Ventricular Node (AVN) present in the lower corner of the right atrium, delays the
spreading of impulses to heart ventricles for about 0.1 second. This pause allows the atria to empty completely into the ventricles before the ventricles pump out the blood.

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