Question

explain the mechanism of blood circulation​

Answer 1

Answer:

Blood enters the heart through two large veins ,the inferior and superior vena cava ,emptying oxygen -poor blood from the body to the right atrium .As the ventricle contracts ,blood leaves the heart through the pulmonic valve ,into the pulmonary artery and to the lungs where it is oxygenated.

Answer 2

Explanation:

Blood circulation

It consists of the heart and blood vessels running through the entire body.The arteries carry blood away from from the heart ;theveins carry it back to the heart .In the systematic circulation, the left ventricle pumps oxygen -rich blood into the main artery

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