Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility.
    

concept

Scheme for in vitro fertilisation

Dragons and griffins around a lone flowering tree in a landscape on the outskirts of a town; representing a stage in the alchemical process. Coloured etching after etching, ca. 17th century.

Sperm swimming towards an egg

Spermatozoa approaching an egg; representing equality between men and women, and the undesirability of inequality. Colour lithograph, 2004.

Über den chemischen Charakter des Befruchtungsvorgangs und seine Bedeutung für die Theorie der Lebenserscheinungen : Vortrag gehalten auf dem Internationalen Zoologenkongress zu Boston am 22. August 1907 / von Jacques Loeb.

Spermatozoa

Images

Catalogue

Über den chemischen Charakter des Befruchtungsvorgangs und seine Bedeutung für die Theorie der Lebenserscheinungen : Vortrag gehalten auf dem Internationalen Zoologenkongress zu Boston am 22. August 1907 / von Jacques Loeb.

Prof Thaddeus Mann.

Spermatozoa approaching an egg; representing equality between men and women, and the undesirability of inequality. Colour lithograph, 2004.

Note on the penetration of the spermatozoon into the interior of the ovum / by Martin Barry, M.D.

Über den chemischen Charakter des Befruchtungsvorgangs und seine Bedeutung für die Theorie der Lebenserscheinungen : Vortrag gehalten auf dem Internationalen Zoologenkongress zu Boston am 22. August 1907 / von Jacques Loeb.