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

Options

(a) pushing open of the venous valves suction pull
(b) stimulation of the sino auricular node
(c) suction pull
(d) pressure difference between the post caval and atrium

Correct Answer:

stimulation of the sino auricular node

Explanation:

In human, blood passes from the post caval to the diastolic right atrium of heart due to suction pull.