How do arterial walls differ between different types of arteries?
There are three main types of arteries: elastic arteries, muscular arteries, and arterioles, each with distinct histological features.
Elastic Arteries Elastic arteries, such as the aorta and its major branches, have a thick tunica media rich in elastic fibers. This allows them to absorb the pressure from the heart's contractions and maintain a steady flow of blood.
Muscular Arteries Muscular arteries, like the radial and femoral arteries, have a higher proportion of smooth muscle cells in their tunica media. These arteries are responsible for distributing blood to various parts of the body and have a greater capacity for vasoconstriction and vasodilation.
Arterioles Arterioles are the smallest arteries and have a relatively thin tunica media. They play a crucial role in regulating blood flow to capillary beds and controlling systemic blood pressure.
