The spermatozoon of Branchiostoma lanceolatum L.
D000818:Animals; D002816:Chordata, Nonvertebrate / Q000166:cytology*; D005407:Flagella / Q000166:cytology; D008297:Male; D008722:Methods; D008854:Microscopy, Electron; D013094:Spermatozoa / Q000166:cytology* / Q000201:enzymology; D013997:Time Factors