Question

In human, blood passes from the inferior vena cava to the diastolic right atrium of heart due to

• A. stimulation of the sino auricular node.
• B. pressure difference between the Inferior vena cava and atrium
• C. pushing open of the venous valves.
• D. suction pull.

Answer 1

The correct option is B

pressure difference between the Inferior vena cava and atrium

Diastolic right atrium has less pressure and inferior vena cava post has high pressure, thus blood moves from this vein into the right atrium.