title: Fine structure of the reproductive system of a frog lung fluke. 3. The spermatozoon and its differentiation.
mesh_terms: D000818:Animals; D001001:Anura; D002454:Cell Differentiation; D002462:Cell Membrane; D002466:Cell Nucleolus; D002467:Cell Nucleus; D008297:Male; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D008870:Microtubules; D008928:Mitochondria; D011894:Rana pipiens; D012270:Ribosomes; D013091:Spermatogenesis; D013094:Spermatozoa / Q000166:cytology*; D014200:Trematoda / Q000166:cytology*