Which type of vessel contains elastin in all three tunics to

Which type of vessel contains elastin in all three tunics to allow the vessel to expand and recoil as the heart ejects blood

Solution

Elastin is predominantly present in the arteries.

The arteries function as low-resistance conduits and as pressure reservoirs for maintaining blood flow of the tissues during ventricular relaxation. Arterioles, the major site of resistance to flow in the vascular system, play a major role in determining both mean arterial pressure and the distribution of flows to the various organs and tissues.

Arterioles, the major site of resistance to flow in the vascular system, play a major role in determining both mean arterial pressure and the distribution of flows to the various organs and tissues. Arteriolar resistance is determined by local factors and by reflex neural and hormonal input. The lymphatic system provide a one-way route for movement of interstitial fluid to the cardiovascular system. Lymph returns the excess fluid filtered from the blood vessel capillaries, as well as the protein that leaks out of the blood vessel capillaries. Lymph flow is driven mainly by contraction of smooth muscle in the lymphatic vessles but also by the skeletal muscle pump and the respiratory pump.