Spermatids are connected together by cytoplasmic material and have superfluous cytoplasmic material around their nuclei.
The spermatids at this point are still round cells. During the process called spermiogenesis the sperm extrude tails, repackage DNA into a head, ...
Then the spermatids differentiate into sperm, losing most of their cytoplasm in the process.
The cell that undergoes meiosis is a primary spermatocyte. The first meiotic division produces two secondary spermatocytes and the second division produces spermatids, which mature to form sperm.
Most of these cells are in a condition of karyokinetic division, and the cells which result from this division form those of the next layer, the spermatoblasts or spermatids.
A type of cell found within seminiferous tubules of the testes, a nutritive cell to which spermatids attach for the duration of spermatogenesis until the mature spermatozoa is formed. Sertoli cells form the blood-testis barrier. Synonym: nurse cell.
[Gk. sperma, seed + kytos, vessel]
The diploid (2n) cells formed by the enlargement and differentiation of the spermatogonia; they give rise by meiotic division to the spermatids.
spermatogonia ...
Seminiferous tubules are inside each testis, and are where sperm are produced by meiosis. About 250 meters (850 feet) of tubules are packed into each testis. Spermatocytes inside the tubules divide by meiosis to produce spermatids that in turn ...
 See also: Sperm, Spermatid, Cell, Division, Spermatocyte
  
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