Cervical part of esophagus all are true except-

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.