heart structure and function

The busiest human organ is the heart. World’s first heart transplant Dr. Christian Bernard The first artificial heart was used (during surgery) by michael de bane was did.

The pace-maker controls the heartbeat. The heartbeat of a healthy person is 72 times per minute. Heart sounds (lub, dub) can be heard with a stethoscope.

Arteries carry purified blood or oxidized blood from the heart to various organs. They lack valves, the wall is thick and blood red.

The vein carries impure blood or unoxidized blood from various organs to the heart. They have valves, thin walls and purple blood.

Pulmonary artery carries impure blood and pulmonary vein carries pure blood. Pure blood flows in the left atrium and ventricle of the heart and impure blood flows in the right atrium and ventricle.

At the time of donating blood, blood is taken from the veins and put into the veins only. The heart beats about 70 ml in one beat. The blood pumps.

ECG is related to the heart which measures the heart rate. Acidity increases the heart rate and alkalinity lowers the heart rate.

The weight of a normal person’s heart is about 350 grams. The pumping capacity of the heart is 4.5 liters per minute.