MCQ IN MEDICINE

Detailed explanation-1: -The circulatory system, which is made up of the heart and blood vessels, supports the respiratory system by bringing blood to and from the lungs. The circulatory system helps deliver nutrients and oxygen from the lungs to tissues and organs throughout the body. It also helps remove carbon dioxide and waste products.

Detailed explanation-2: -As discussed previously, the respiratory system works in conjunction with the cardiovascular system to transport oxygen and nutrients to cells and remove waste from cells and out of the body during exhalation.

Detailed explanation-3: -The oxygen in inhaled air passes across the thin lining of the air sacs and into the blood vessels. This is known as diffusion. The oxygen in the blood is then carried around the body in the bloodstream, reaching every cell. When oxygen passes into the bloodstream, carbon dioxide leaves it.