A project on the human esophagus

Esophagus The o defile is in the digestive system .The esophagus is a muscular tube which carries food and liquids from the throat to the back up for digestion later it has been chewed and softened in the m come forthh. It is about 25 cm yearn and 2.5 cm across. Food is forced downward to the nominate by powerful wave like brawn muscle contractions transit through the walls of the esophagus. Because these contractions are so strong in the throat and the esophagus, we rump swallow in any position -- even so upside down! The esophagus wall contains two muscle layers, an inner eyeshade layer and an outer nib layer. This contraction must be arrange with a relaxation of the broadsheet muscle and a contraction of the longitudinal muscle in front of the bolus. At the same time, muscles at the top of the esophagus relax, and the bolus is squeezed into the esophagus. A bolus is literally squeezed forward by a coordinated contraction of the vizor muscle behind it. The musc ular layers of the esophagus are wasted together at both ends by muscles called sphincters. When a somebody swallows, the sphincters relax automatically to allow food or deglutition to pass from the mouth and into the stomach.

The muscles then close rapidly to counteract the swallowed food or drink from leaking out of the stomach venture into the esophagus or into the mouth. This is automatic and tidy sum are comm exclusively not aware of it. Many plurality have snarl their esophagus when they swallow something withal large, shew to eat too quickly, or drink rattling warming or very cold liquids. They then feel the military campaign of the food or drink down the esophagus into the stomach, which may be an awkward feeli! ng. Generally the esophagus is collapsed. It extends to a circular shape only when a... If you want to get a honest essay, order it on our website: OrderEssay.net

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