title: Fine structure of the gastric epithelium of the ascidian Botryllus schlosseri. Vacuolated and zymogenic cells.
mesh_terms: D000818:Animals; D002816:Chordata, Nonvertebrate / Q000033:anatomy & histology*; D004721:Endoplasmic Reticulum; D005753:Gastric Mucosa / Q000166:cytology*; D006056:Golgi Apparatus; D008854:Microscopy, Electron; D013045:Species Specificity