Heart is an international peer review journal that keeps cardiologists up to date with advances in the diagnosis and treatment of cardiovascular disease. It’s located a little to the left of the middle of your chest, and it’s about the size of your fist. The working of the human heart is like the heart fills with blood initially. Then its muscle contracts to squirt the blood along. When the heart contracts, it squeezes the blood out of the heart.
The average adult has about five liters of blood living inside of their body which flows through the heart. The heart pumps the blood through the arteries and the after purification pumps out the blood through the veins