EVERYDAY SCIENCE

Detailed explanation-1: -Capillaries, the smallest blood vessels, connect arteries and veins.

Detailed explanation-2: -Capillaries: The blood vessels that join arteries and veins are known as capillaries. Capillaries are the tiniest vessels, with walls that are only one cell thick. Material is exchanged between the blood and the surrounding cells through these capillaries with thin walls.

Detailed explanation-3: -Eventually, the smallest arteries, vessels called arterioles, further branch into tiny capillaries, where nutrients and wastes are exchanged, and then combine with other vessels that exit capillaries to form venules, small blood vessels that carry blood to a vein, a larger blood vessel that returns blood to the heart.