EVERYDAY SCIENCE

Detailed explanation-1: -veins-these return blood to the heart. capillaries-these are tiny vessels that connect arteries and veins. Their thin walls allow blood to come into close contact with tissues to exchange oxygen, carbon dioxide, nutrients and waste products.

Detailed explanation-2: -Capillary walls are only one cell thick, allowing exchange of gases, nutrients, and wastes. Capillaries are so fine that red blood cells must line up single-file to go through them.

Detailed explanation-3: -Name the blood vessels in order that a red blood cell passes through them as it leaves the heart, travels through the tissue and returns to the heart. Elastic artery, muscular artery, arteriole, capillary, venule, vein.

Detailed explanation-4: -Endothelial Cells Line All Blood Vessels The wall is lined by an exceedingly thin single sheet of endothelial cells, the endothelium, separated from the surrounding outer layers by a basal lamina.

Detailed explanation-5: -Continuous capillaries are the most common type of capillary in your body. Like other blood vessels, they have a lining made up of a type of cell called endothelial cells.