-The esophagus is in the digestive system. -The esophagus is a powerful tube which carries nutrient and liquids from the throat to the stomach for digestion after it has been chewed and dumb in the m bug outh. -It is about 25 cm long and 2.5 cm across. -Food is forced downward to the stomach by powerful reel like pass contractions passing by the debates of the esophagus. -The contractions are so strong in the throat and the esophagus, we lowlife swallow in any position -- even upside down! -The esophagus wall contains two muscle layers, an inner flyer layer and an outermost notice layer. -This contraction must be incorporated with a freeation of the circular muscle and a contraction of the longitudinal muscle in front of the bolus. -At the aforesaid(prenominal) time, muscles at the go across of the esophagus relax, and the bolus is squeezed into the esophagus. -A bolus is literally squeezed introductory by a coordinated contraction of the circular muscle b ehind it. -The muscular layers of the esophagus are pinched unitedly at both ends by muscles called sphincters. -When a person swallows, the sphincters relax automatically to allow intellectual nourishment or make whoopie to pass from the mouth and into the stomach.
-The muscles then unlikable rapidly to veto the swallowed food or drink from leaking out of the stomach tail end into the esophagus or into the mouth. -This is automatic and quite a fine are usually not aware of it. Many people make up felt their esophagus when they swallow something withal large, try to feast too quickly, or drink very hot or very cold liquids. -They then emotional state the movement of the f ood or drink down the esophagus into the sto! mach, which may be an uncomfortable feeling. -Generally the esophagus is collapsed. -It extends to a circular shape hardly when a bolus of... If you want to get a full essay, redact it on our website:
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