OBO_REL:part_of (UNDECLARED) tissue intestinal epithelium intestinal villus TAO:0005125 The entire digestive tract is lined by well developed villi, which are longest in the intestinal bulb and decrease progressively in size towards the caudal end of the intestine. No crypts are present, but, the regions between the villi, the intervillus pockets, have a crypt-like function. Cells are produced in the intervillus pockets and shed from the villus tips. Crosnier et al. 2005 teleost_anatomy