This class is probably too inclusive

Portion of the alimentary canal bounded anteriorly by the pyloric sphincter and posteriorly by the cloacal sphincter.[AAO], The tract of the alimentary canal. [Dorian_AF, Elsevier's_encyclopaedic_dictionary_of_medicine, Part_B:_Anatomy_(1988)_Amsterdam_etc.:_Elsevier][VHOG]

uberon

intestinal tract

intestinal

UBERON:0000160

In zebrafish, No stomach, small intestine, or large intestine can be distinguished. However, differences can be found in the morphology of the mucosa columnar epithelial cells and the number of goblet cells, suggesting functional differentiation. The intestine has numerous folds that become progressively shorter in a rostral-to-caudal direction. Proportionally, these folds are significantly larger than the finger-like intestinal villi of mammals and other amniotes (Wallace et al. 2005). Columnar-shaped absorptive enterocytes are the most numerous in the zebrafish intestinal epithelium. Goblet cells are the second most populous epithelial cell type.

• lumen of intestine

• intestinal epithelium
• large intestine
• small intestine
• intestine smooth muscle

• celiac artery

• mesenteric vein

• pancreatic duct

• mesenteric artery

• intestine secretion

• ileocecal junction
• wall of intestine
• large intestine
• small intestine
• lumen of intestine
• striated border microvillus layer