Ambient temperature is the term used to identify the surrounding or environmental temperature. It is the nature and tendency of all things to approach ambient temperature. If you are in a room, then the ambient temperature is the room temperature.
An arteriole is a small-diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries. Arterioles have muscular walls and are the primary site of vascular resistance. The greatest change in blood pressure and velocity of blood flow occurs at the transition of arterioles to capillaries.
Arteriosclerosis, a general term that refers to the hardening and thickening of the arteries, is responsible for the majority of deaths in the United States. The most common type is atherosclerosis; other types include focal calcific arteriosclerosis, arteriosclerosis obliterans, and arteriolosclerosis. All forms of arteriosclerosis are characterized by a buildup in the arteries -- whether of plaque or calcium.