Human spermatozoa: unidirectional rotation of the tail as indicated by head-to-head agglutinates.
Rotating head-to-head agglutinates of human spermatozoa were always observed to turn counter-clockwise. The phenomenon seems to suggest a unidirectional rotatory component in the tail movement that may be related to the substructure of the axoneme.
D006801:Humans; D008297:Male; D009068:Movement; D013073:Sperm Agglutination; D013082:Sperm Tail / Q000502:physiology*; D013094:Spermatozoa / Q000502:physiology*