AIPMT PRELIMS 2008 Zoology Circulatory System MCQ Question with Solution

In humans, blood passes from the post caval to the diastolic right atrium of heart due to:

A

stimulation of the sino auricular node

B

pressure difference between the post caval and atrium

C

pushing open of the venous valves

D

suction pull

Option B

Blood flows due to the pressure difference between the veins and the atrium.

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