Which of the following is incorrect regarding anatomy of esophagus?
A. The length of the esophagus is 40cmB. It is lined throughout by columnar epithelium
C. The proportion of the smooth muscle decreaseson progression from upper to lower end whencompared to skeletal muscle.
D. The lower esophageal sphincter is powerful striated muscle
E. Cricopharyngeal sphincter is located at 15cmfrom upper incisor teeth.
The length of the esophagus is 40cm, B. It is
lined throughout by columnar epithelium, C. The proportion of the smooth muscle
decreaseson progression from upper to lower end when compared to skeletal
muscle. D. The lower esophageal sphincter is powerfulstriated muscle.
The length of the esophagus is 25 cm. It is lined by squamous epithelium throughout and the musculature of the upper esophagus is striated. Thisis followed by a transitional zone of both striated andsmooth muscle with the proportion of the latterprogressively increasing so that in the lower half, there issmooth muscle.Upper sphincter is powerful striated muscle. The lower sphincter is more subtle, created bythe asymmetrical arrangement of themuscle fibres.There is no serosal layer.
The length of the esophagus is 25 cm. It is lined by squamous epithelium throughout and the musculature of the upper esophagus is striated. Thisis followed by a transitional zone of both striated andsmooth muscle with the proportion of the latterprogressively increasing so that in the lower half, there issmooth muscle.Upper sphincter is powerful striated muscle. The lower sphincter is more subtle, created bythe asymmetrical arrangement of themuscle fibres.There is no serosal layer.
