An arteriole /ÉrËtÉªÉri.oÊl/ 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 (usually only one to two layers of smooth muscle) 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.The decreased velocity of flow in the capillaries reduces the pressure and increases exchange of gas and nutrients.Arterioles receive autonomic nervous system innervation and respond to various circulating hormones in order to regulate their diameter. Retinal vessels lack a functional sympathetic innervation.he greatest change in blood pressure and velocity of blood flow occurs at the transition of arterioles to capillaries. The decreased velocity of flow in the capillaries reduces the pressure and increases exchange of gas and nutrients.
Nazareth is a borough in Northampton County, Pennsylvania, in the United States. The population was 5,746 at the 2010 census. Nazareth is located seven miles (11 km) northwest of Easton, four miles (6 km) north of Bethlehem and twelve miles (19 km) northeast of Allentown. It is located in the center of Northampton County, and is part of Pennsylvania's Lehigh Valley region.
Nazareth Area High School. Nazareth High School is a public high school located in Nazareth, Pennsylvania, in the United States. It is the only high school in the Nazareth Area School District and serves grades 9 through 12. Its mascot is the Blue Eagle and school colors are blue and white.