Describe double circulation of blood in human beings why is it necessary

Double circulation Humans have a double circulatory system. The heart pumps blood through two circuits: • the pulmonary circulation • the systemic circulation The pulmonary circulation transports blood to the lungs. At the lungs: • oxygen diffuses into the blood from the alveoli – the blood becomes oxygenated • carbon dioxide diffuses from the blood into the lungs The systemic circulation transports: • oxygen and nutrients to the body • carbon dioxide and other waste away from cells The systemic circulation is under high pressure - it has to deliver blood to the extremities of the body. The pulmonary circulation is under lower pressure, because: • blood is delivered to the lungs only, which are very close to the heart • in a healthy person, this lower pressure is optimum for the diffusion of gases The heart Blood is pumped around the body by the heart. The heart is made of cardiac muscle that is able to contract to pump blood around the two circulatory circuits of the body. It has four chambers - two atria and two ventricles . Note that left and right refers to the side in the person's body, not how it is viewed on the page. The atria • Top chambers which receive blood under low pressure from veins. • Thin walls as little pressure is required during contraction to push blood into the ventricles. The ventricles • Bottom chambers of the heart. They receive blood from the atria above. • Thicker walls which contract to pump blood out of the heart to areas of the body. • The le...

Double circulation is the process of blood flow through heart twice. Deoxygenated blood from body is returned to heart from where it is pumped to lungs. Lungs purify the blood and the oxygenated blood from the lungs return back to heart and is pumped to the body via aorta. Double circulation is necessary because it separates the oxygenated and deoxygenated blood, makes the circulatory system more efficient, maintains constant body temperature, increased pressure of blood flow, quick supply of oxygen etc.

ever talked about this question and this question was asked to describe double circulation of blood in human beings why is it necessary so basically if we talked about the double circulation right ever talked about the double circulation so the circulation in human being is double circulation why it is called double circulation because in case of the human beings blood right blood flows through the heart to X right blood flows through the heart 2 times in one cycle right so the complete circulation of blood in humans is known as a double circulation discuss the blood is flowing through the heart in is flowing through the heart to X right hand the reason is static circulation in case of a human beings is considered as double circulation now we talked about the two types of circulation of the two steps involved write the two circulation the two steps involved here are basically number one is the pulmonary circulation right pulmonary circulation right so in this circulation what happens is that the blood flows right that the blood flows or passes from heart to lungs right heart to lungs and back to the heart right so basically the circulation takes place between heart and lungs right and the others circulation is basically the systemic circulation write the other circulation is the systemic circulation this basically what happens is that the heart pumps the blood heart pumps blood to other body parts right to other body parts heart pumps deoxygenated blood to other body parts...