What is heart what is the job of the heart

The hearts job is to pump blood around your body to keep you alive. There is double circulation because the oxygenated blood comes from the lungs and out the aorta into the body as well as the deoxygenated blood comesfrom around the body and circulates out the pulmomary artery into the lungs

Heart: One of your main organisms in your body that helps pump blood through your whole body

Job: Carrie blood with oxegen, food, and minerals that your body uses to work, think, move, and grow.
Hope this helps!