Which of the following is true about esophagus except:
Correct Answer: Middle & lower third made up of striated muscle
Description: Answer-(B) Middle & lower third made up of striated muscleEpithelium is stratified squamous non-keratinized epithelium.Muscularis mucosa contains only longitudinal layer and no circular layer.Mucosa is the toughest and strongest layer.Serosa is absent.Muscularis externa is made up of skeletal muscle fibers only in the upper third, smooth muscles only in the lower third and both types of muscle fibers in middle third. At upper end the longitudinal coat splits into two bundles and the triangular interval between them is called Laimer's tringle which is filled with circular muscle fiber
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