Home Biology Body Fluids and Circulation Double Circulation and Regulation of Cardiac Activity, Cardiac Cycle,Heart Sound Blood enters into the heart because muscles …
Biology Body Fluids and Circulation Double Circulation and Regulation of Cardiac Activity, Cardiac Cycle,Heart Sound Single Correct MCQ
Published on: August 12, 2026

Blood enters into the heart because muscles of :

A
Atria relax
B
Ventricle contract
C
Ventricle relax
D
Atria contract

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Text Solution

Verified by Experts
The correct answer is:
NOT AVAILABLE

Atrial diastole is characterized by the relaxation of the atrial muscles. During this stage, the blood enters into the atria, as the volume of the blood in the atria increases the pressure within it decreases. So, the correct answer is option a.

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