All of the following regarding esophagus are true except:
Ans b) Lower one third is lined by transitional epitheliumEsophagus- LiningMucosa - stratified squamous non keratinized epitheliumSubmucosa - mucous gland throughout its length and lymphoid tissueMuscularis externa - toughest layerUpper one third - Striated muscleMiddle one third - Striated & smooth muscleLower one third - smooth muscleAdventitiaDistance from incisor teethBony levelAnatomical landmarks115cmsC6Phnryngo esophageal junction222.5cms-Aorwc arch crosses it327.5cms-Lt bronchus crosses it440cmsT10Pierces diaphragmTotal length = 25 cmsEsophageal constrictions
Length is 25 cms
Lower one third is lined by transitional epithelium
Upper two third is lined by stratified squamous epithelium
pass behind the Lt main bronchus
Thorax