The term<unk>  refers to the haploid male gametid that results from division of secondary spermatocytes.  As a result of meiosis, each<unk>  contains only half of the genetic material present in the original primary spermatocyte.<unk> s are connected together by cytoplasmic material and have superfluous cytoplasmic material around their nuclei.
When formed, early round<unk> s must undergo further maturational events in order to develop into spermatozoa, a process termed spermiogenesis (also termed spermeteliosis).
The<unk> s begin to grow a tail, develop a thickened mid-piece where the mitochondria become localised and form an acrosome.<unk>  DNA also undergoes packaging, becoming highly condensed.  The DNA is packaged firstly with specific nuclear basic proteins, which are subsequently replaced with protamines during<unk>  elongation.  The resultant tightly packed chromatin is transcriptionally inactive.
Spermatid
Gametocyte
Ovum
Blastocyst
Endospore
Speculum
Dermatophyte
Oocyte