The largest oil spill to occur in the United States so far was the Exxon Valdez spill into Prince William Sound, Alaska, in March 1989. The Exxon Valdez, a medium-sized oil tanker, ran aground on a reef to cause this spill of almost 11 million gallons of crude oil.
Sphincters, composed of skeletal muscles, regulate movement through our digestive and urinary systems, thus, controlling swallowing, defecation and even urination. Skeletal muscle contraction generates heat, which helps to maintain body temperature.
Smooth muscle, skeletal muscle, and striated muscle are all muscular tissues. They have differences however, smooth muscle is involuntary and is usually found in the visceral organs (these are stomach, the intestines and the like) of the body; a striated muscle can either be skeletal or cardiac, they are striated because of the presence of certain proteins that constitute them.