title: A comparative study on the origin, distribution, and fine structure of extracellular tubules in the male reproductive system of species of isopods, amphipods, schizopods, copepods, and cumacea.
mesh_terms: D000818:Animals; D002467:Cell Nucleus; D003445:Crustacea / Q000033:anatomy & histology*; D004721:Endoplasmic Reticulum; D004847:Epithelial Cells; D005837:Genitalia, Male / Q000166:cytology*; D006056:Golgi Apparatus; D008297:Male; D013091:Spermatogenesis; D014649:Vas Deferens / Q000166:cytology