Two basic types of smooth muscle. 1) multiunit a) groups of cells function independently b) innervated by autonomic (involuntary) nervous system 2) found in large blood vessels, large airways, eye (for adjusting lens and iris), arrector pili 3) single unit (visceral).
Electromagnetic waves are formed when an electric field (shown as blue arrows) couples with a magnetic field (shown as red arrows). The magnetic and electric fields of an electromagnetic wave are perpendicular to each other and to the direction of the wave. James Clerk Maxwell and Heinrich Hertz are two scientists who studied how electromagnetic waves are formed and how fast they travel.
S wave. An S wave, or shear wave, is a seismic body wave that shakes the ground back and forth perpendicular to the direction the wave is moving. Share this page: 1  Facebook. 2  Twitter. 3  Google. 4  Email. 5  Earthquakes.