Answer:
Human heart is the main organ that pump blood to the whole body. Aves and mammals have four chambered heart consists of two right auricles and two right ventricles.
The left ventricle is responsible for the transport of the blood in the whole body. The blood flows from the left ventricles has high pressure and must be thick as high pressure can damage the ventricles. Right ventricles pump blood to the lungs and are thick as right ventricles has low pressure than left ventricles.