Length of esophagus is ?
10 cm
15 cm
25 cm
40 cm
Ans. is 'c' i.e., 25 cm Oesophagus 25cm longAerial supply:Cervical pa - Inferior thyroid aeryThoracic pa - Oesophageal branches of aoaAbdominal pa - Left gastric aeryVenous drainage:Cervical pa - Brachiocephalic veinsThoracic pa - Azygous veinsAbdominal pa - Left gastric veinLymphatic drainage:Cervical pa - Deep cervical nodesThoracic pa - Posterior mediastinal nodesAbdominal pa - Left gastric nodesNerve supply:Parasympathetic - Upper 1/2 - Recurrent laryngeal nerves Lower 1/2 - Oesophageal plexus (vagus)Sympathetic - Upper 1/2 - Fibres from middle cervical ganglion Lower 1/2 - Fibres from upper 4 thoracic ganglia Oesophagus shows 4 constrictions,At its beginning, 15cm from incisorsAoic arch - 22.5cm from incisorsLeft bronchus - 27.5cm from incisorsDiaphragm - 37.5cm from incisorsLower esophageal splincter is at diaphragmatic constriction.Oesophagus pierces the diaphragm at TIO level. Ends by opening into the bstomach at T11 level.