MICROANATOMY

Detailed explanation-1: -Your heart pumps blood around the body all the time-about 5 litres (8 pints) of it. This is called circulation. Your heart, blood and blood vessels together make up your cardiovascular system (or heart and circulatory system).

Detailed explanation-2: -Your heart is divided into two separate pumping systems, the right side and the left side. Blood is pumped through your heart and lungs in four steps: The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle through the tricuspid valve.

Detailed explanation-3: -The heart’s blood pumping cycle, which is called the cardiac cycle, begins when oxygen-free blood returns to the heart through the right atrium, after distributing oxygen and nutrients to other parts of the body. The blood then moves into the right ventricle, which facilitates a transfer of blood into the lungs.