The mammalian heart is a muscular double pump. It is divided into two sides. The right side pumps deoxygenated blood to the lungs to be oxygenated. The left side pumps oxygentated bloody to the rest of the body. On both sides the heart sqeezes the blood, putting it under pressure. This pressure forces the blood along the arteries.
External features of the heart
the heart sits slightly off-centre to the left of the chest cavity. it lies with the atria in the middle of the cavity. The main part of the heart consists of dark red…