title: Structural changes in the surface involved in head-to-head association of washed bull spermatozoa.
mesh_terms: D000818:Animals; D002417:Cattle; D002462:Cell Membrane; D006652:Histological Techniques; D008027:Light; D008297:Male; D013094:Spermatozoa / Q000166:cytology*; D013499:Surface Properties