The alimentary tract in the abdomen consists of the lower oesophagus , the stomach , the duodenum , the jejunum , ileum 腹腔内的消化道器官有：下食道、胃，十二指肠、空肠、回肠、盲肠和阑尾、升结肠、横结肠、降结肠、乙状结肠以及直肠。
A NEW SPECIES OF GENUS CONTRACAECUM (ORINTOCAECUM) FROM EUROPEAN WHITE PELICAN (ASCARIDATA:ANISAKIDAE)寄生于鹈鹕的对盲囊线虫一新种(蛔亚目:异尖科)