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Class 11 NEET Biology Body Fluids and Circulation

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Question : 22

Total: 107

A specialised 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 0.1‌sec. The delay allows.

blood to enter aorta.
the ventricles to empty completely.
blood to enter pulmonary arteries.
the atria to empty completely.

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