MICROANATOMY

Detailed explanation-1: -The heart is a pump that sends the blood circulating through our body. The pumping action takes place when the left ventricle of the heart contracts. This forces the blood out into the arteries, which expands to receive the oncoming blood.

Detailed explanation-2: -For your heart to keep pumping regularly, it needs electrical signals which are sent to the heart muscle telling it when to contract and relax. The electrical signal starts in the right atrium where your heart’s natural pacemaker-the sino–atrial node-is situated. This signal crosses the atria, making them contract.

Detailed explanation-3: -With each heartbeat, the heart sends blood throughout our bodies, carrying oxygen to every cell. After delivering the oxygen, the blood returns to the heart. The heart then sends the blood to the lungs to pick up more oxygen. This cycle repeats over and over again.

Detailed explanation-4: -The heart pumps blood by expanding and then contracting, first taking in blood and then pushing it through the circulatory system. During each beat of the heart, the ventricles relax, expanding their volume to collect blood from the atria.

Detailed explanation-5: -Heart, a muscular organ that pumps blood throughout your body. Blood vessels, which include your arteries, veins and capillaries.