PATHOLOGY

Detailed explanation-1: -The heart consists of four chambers in which blood flows. Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium.

Detailed explanation-2: -The four-chambered heart provides an efficient solution by keeping oxygenated and non-oxygenated blood separate. The supply of oxygen to the body can also be improved by increasing how often the heart contracts.

Detailed explanation-3: -The human heart consists of 4 chambers-two atria and two ventricles. The upper chambers are called the left atrium and right atrium. The lower chambers are called the left ventricle and right ventricle.