You can't live without your heart. It's function is to pump blood through the body. Its vital for survival.

It also gives the body oxygen & nutrients & removes waste.

The human heart is made up of 4 chambers: the right atrium, right ventricle, left atrium, left ventricle.

First, blood enters the heart through an artery called the Vena Cava. Arteries are blood vessels that carry oxygen rich blood from the heart to the tissues of the body.

Next, blood travels into the right ventricle of the heart and through the pulmonary artery into the lungs.

Then, from the lungs the blood goes through the pulmonary vein (when it's high in oxygen) into the left atrium of the human heart. It's high in oxygen because the blood has not yet traveled to the body to provide nutrients.

Veins carry blood to the heart.

Then, blood enters the heart again but this time into the left atrium. From there, the blood goes into the left ventricle.

After that, the blood then leaves the heart once again and goes into the aorta still high in oxygen. Blood then travels to all the tissues in the body providing nutrients and removing waste.

This process then repeats over and over again !