EVERYDAY SCIENCE

Detailed explanation-1: -This property allows nutrients and oxygen to travel through the bloodstream and diffuse into the tissues. As a result, waste materials can diffuse out of tissues into the bloodstream and be carried to the lungs, where they can be re-oxygenated. In other words, capillaries with thin walls allow diffusion to occur.

Detailed explanation-2: -The thin walls of the capillaries allow oxygen and nutrients to pass from the blood into tissues and allow waste products to pass from tissues into the blood.

Detailed explanation-3: -Veins have thicker walls than capillaries. Veins use valves to transport blood towards the heart, but capillaries don’t have valves. Capillaries diffuse blood and nutrients between veins and arteries through their thin walls.

Detailed explanation-4: -Arteries have thick walls because they need to withstand high pressure generated by the heart. Veins have thin walls because they do not need to withstand as much pressure. Arteries are also narrower than veins, which allows for faster blood flow.

Detailed explanation-5: -It is important for capillaries to have thin, permeable walls to allow substances to diffuse into and out of cells.