EVERYDAY SCIENCE

Detailed explanation-1: -Exchange of Gases, Nutrients, and Waste Between Blood and Tissue Occurs in the Capillaries. Capillaries are tiny vessels that branch out from arterioles to form networks around body cells. In the lungs, capillaries absorb oxygen from inhaled air into the bloodstream and release carbon dioxide for exhalation.

Detailed explanation-2: -Capillaries-these are the sites of gas exchange between the tissues.

Detailed explanation-3: -Gas exchange takes place between blood and alveoli in the lungs, and then between blood and tissue cells all around the body through simple diffusion.

Detailed explanation-4: -The superior vena cava carries blood from the head, neck, arms, and chest. The inferior vena cava carries blood from the legs, feet, and organs in the abdomen and pelvis. The vena cava is the largest vein in the body.

Detailed explanation-5: -Capillaries are the simplest blood vessels. They are the smallest of the body’s blood vessels. The major function of capillaries is the exchange of gases and nutrients between blood and tissues.