Definition

Atherosclerosis (pronounced ath-uh-ro-skluh-RO-siss) is the build-up of a waxy deposit on the inside of blood vessels. Atherosclerosis is a form of arteriosclerosis (pronounced ar-tir-ee-o-skluh-RO-siss). Arteriosclerosis refers to any condition in which the arteries become hard and less flexible. The two terms are often used interchangeably, although it is not really correct to do so.

Description

The arteries are blood vessels that carry blood from the heart to all parts of the body. Arteries are made up of several layers of tissue that are normally soft and pliable. The layers must be able to expand and contract as blood passes through them.

Arteries often become leathery and rigid. When that happens, blood may flow less easily through the arteries. The hardening of arteries is called arteriosclerosis. Many factors can cause arteriosclerosis. Normal aging, high blood pressure, and certain diseases, such as diabetes (see diabetes mellitus entry), are common...