PATHOLOGY

Detailed explanation-1: -There are three types of blood vessels: Arteries carry blood away from your heart. Veins carry blood back toward your heart. Capillaries, the smallest blood vessels, connect arteries and veins.

Detailed explanation-2: -Blood vessels are part of the cardiovascular system that transports blood throughout the human body. There are three major types of blood vessels: veins, arteries, and capillaries. Figure 7.4. 2: This figure shows the heart and the major arteries of the cardiovascular system.

Detailed explanation-3: -Aside from capillaries, blood vessels are all made of three layers: The adventitia or outer layer which provides structural support and shape to the vessel. The tunica media or a middle layer composed of elastic and muscular tissue which regulates the internal diameter of the vessel.

Detailed explanation-4: -A four-week-old human embryo already has miles of blood vessels. By adulthood, we each have 60, 000 miles of blood vessels inside our bodies – that’s more than twice the distance around the world.