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.
The liver, the pancreas, and the sphincter of Oddi all play important roles. The liver provides a chemical called bile to the digestive process, and the pancreas provides pancreatic juice. These important chemicals flow into the small intestine to help with digestion. The flow of these chemicals is controlled by a muscle called the sphincter of Oddi. A sphincter is a muscle (usually round) that can open and close. When it's working properly, the sphincter of Oddi opens to allow bile and pancreatic juice to flow through, and then closes again. However, in a condition called sphincter of Oddi dysfunction, the sphincter muscle does not open when it should.