Explanation: During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature. Advertisement. Sapnapp.

Double circulation is necessary in humans because it allows for the efficient transport of oxygen and nutrients to the body’s tissues while also ensuring that waste products are removed. The pulmonary circuit is responsible for oxygenating the blood and removing carbon dioxide, which is essential for the survival of all cells in the body.

It is necessary for maintaining body temperature and collecting CO2 from cells and provising oxygen and energy to cells & tissues. Advertisement Brainly User "In human beings, the blood passes through the human heart two times to supply once to the whole body. This is known as Double Circulation of blood."

Grade 12 Zoology Respiration Back to subjects Previous Next Respiration Respiration can be defined as biochemical process by which foods are oxidized to liberate energy. Overall respiration involves two processes. Types of Respiration 1. Aerobic It occurs in all higher forms (organisms) in this type Oxygen is necessary.

Coronary circulation is the circulation of blood in the arteries and veins that supply the heart muscle (myocardium). Coronary arteries supply oxygenated blood to the heart muscle. Cardiac veins then drain away the blood after it has been deoxygenated.

The systemic circulation provides the functional blood supply to all body tissue. It carries oxygen and nutrients to the cells and picks up carbon dioxide and waste products. Systemic circulation carries oxygenated blood from the left ventricle, through the arteries, to the capillaries in the tissues of the body.

Solution. Verified by Toppr. The heart is divided into four chambers and has valves that allow the blood to flow in one direction only. The upper two chambers with relatively thin walls are called atria. The two lower chambers with thick muscular walls are called ventricles. The figure shows the complete circulatory system in the body.

In human beings, the blood passes through the heart twice in order to complete one cycle. It passes through the right side of the heart as deoxygenated blood and through the left side as oxygenated blood.

Heart. (1) It is a muscular organ, big as our fist, reddish brown in colour, situated between the 2 lungs in middle of thoracic cavity, surrounded by 2 layered sac. (2) It has different chambers to prevent the oxygen rich blood from mixing with blood containing carbon dioxide. (3) Heart is divided by septa into 2 halves i.e. the right and left.

Double circulation. Humans have a double circulatory system. The heart pumps blood through two circuits: the pulmonary circulation. the systemic circulation.