The scientist who studied the wings of bats for capillaries is …………

Which of the following doesn’t have valves?

Aorta which supplies oxygenated blood to the body parts arise from …………

The blood in veins always flows towards ………………

Pulmonary artery which supplies deoxygeriatecTblood to the lungs arises from …………

Which organ of the body does the term ‘Cardiac’ refer to?

Which side of the human heart is low in oxygen?

The human heart starts beating around ……………. days of embryonic development.

The time needed for atrial contraction is :

The time needed for ventricular contraction is :