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Oesophagus - Anatomy & Physiology (view source)
Revision as of 10:58, 2 July 2008
, 10:58, 2 July 2008no edit summary
==Functional Anatomy==
==Functional Anatomy==
*Begins dorsal to cricoid cartilage of larynx
*Follows trachea down neck, first on the left and then medially once in thorax in the mediastinum
*Passes over heart then through the oesophageal hiatus of the diaphragm
*Passes over the dorsal border of the liver then joins the stomach at the cardia
*The cervical section is accompanied by the common carotid artery, the vagosympathetic trunk and the recurrent laryngeal nerves
*The thoracic section is accompanied by the right and left vagus nerves (CN X)
*Different proportions of striated muscle across the species
*Different proportions of striated muscle across the species
*No glands in mucosa
*No glands in mucosa
*Mucous glands present in submucosa
*Mucous glands (tubulo-acinar) present in submucosa
*Inner circular layer of tunica muscularis thickens near gastric junction forming a sphincter
*Inner circular layer of tunica muscularis thickens near gastric junction forming a sphincter
==Innervation==
*Sympathetic nerves
*Parasympathetic from the vagus nerve (CN X) and recurrent laryngeal nerves
*myenteric plexus extends the length of the oesophagus