The main force which generates the blood pressure in vessels is contraction of the:
Correct answer: B. Ventricles of heart
- A. Atria of heart
- B. Ventricles of heart
- C. Arteries
- D. Veins
Explanation
Ventricular contraction ejects blood into the major arteries, resulting in a flow from regions of higher pressure to regions of lower pressure, as blood encounters smaller arteries and arterioles, then capillaries, then the venules and veins of the venous system.
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About Circulation
The circulatory system covers the chambers, valves and conducting pathway of the human heart, along with the cardiac cycle and control of heartbeat. It compares arteries, veins and capillaries by structure and function, and explains how the lymphatic system returns tissue fluid, transports absorbed fats and supports immunity.
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