MCQ IN MEDICINE

Detailed explanation-1: -The carbon dioxide produced during metabolism is carried back to the lungs by the blood, where it is then exhaled (breathed out). Blood also provides the cells with nutrients, transports hormones and removes waste products, which organs such as the liver, the kidneys or the intestine then get rid of.

Detailed explanation-2: -Blood transports waste substances to the organs that remove and process them for elimination. Blood flows into the kidneys through the renal arteries and out through the renal veins. The kidneys filter substances such as urea, uric acid, and creatinine out of the blood plasma and into the ureters.

Detailed explanation-3: -CO2 is transported in the bloodstream to the lungs where it is ultimately removed from the body through exhalation. CO2 plays various roles in the human body including regulation of blood pH, respiratory drive, and affinity of hemoglobin for oxygen (O2).