PATHOLOGY

Detailed explanation-1: -Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins). The primary function of capillaries is the exchange of materials between the blood and tissue cells.

Detailed explanation-2: -The correct option is A True. Blood vessels: A network of tube-like structures that transport blood from the heart to the tissues and from the tissues to the heart are called blood vessels. There are three types of blood vessels namely-arteries, veins, and capillaries.

Detailed explanation-3: -Capillaries are the smallest blood vessels in the body. How small are they? About ten of them equal the thickness of one human hair, and most are so small that only one blood cell can pass through them at a time.