<prompt> Cervical part of esophagus all are true except-Arise at cricoid levelSite of portosystemic anastomosisForeign body obstruction common at this levelStriated muscle fibres positive  <response>: Ans. is b i.e., Site of portosystemic anastomosis o Portosystemic Porto caval anastomosis is seen in lower part abdominal part of esophagus,o Cervical esophagus begins at lower border of cricoid cartilage at C vertebral level as a downward continuation of pharynx.o Muscularis externa of cerv ical esophagus contains only skeletal muscle striated muscle fibers,o Foreign body obstruction is common in this part of esophagus. 