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.
Arise at cricoid level
Site of portosystemic anastomosis
Foreign body obstruction common at this level
Striated muscle fibres positive
Thoracic Duct & Esophagus