Sperm

The term sperm is derived from the Greek word (σπέρμα) sperma (meaning "seed") and refers to the male reproductive cells. In the types of sexual reproduction known as anisogamy and oogamy, there is a marked difference in the size of the gametes with the smaller one being termed the "male" or sperm cell. A uniflagellar sperm cell that is motile is referred to as a spermatozoon, whereas a non-motile sperm cell is referred to as a spermatium. Sperm cells cannot divide and have a limited life span, but after fusion with egg cells during fertilization, a new organism begins developing, starting as a totipotent zygote. The human sperm cell is haploid, so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell. In mammals, sperm develops in the testicles and is released from the penis. It is also possible to extract sperm throgh TESE.

Read more about SpermSperm in Plants, Motile Sperm Cells, Non-motile Sperm Cells, Sperm Nuclei, See Also

Other articles related to "sperm":

Sperm Chemotaxis in Non-mammalian Species - Chemoattractants
... The sperm chemoattractants in non-mammalian species vary to a large extent ... So far, most sperm chemoattractants that have been identified in non-mammalian species are peptides or low-molecular-weight proteins (1-20 kDa), which are heat stable and ... Exceptions to this rule are the sperm chemoattractants of corals, ascidians, plants such as ferns, and algae (Table 1) ...
Sperm Chemotaxis
... Sperm chemotaxis is a form of sperm guidance, in which sperm cells (spermatozoa) follow a concentration gradient of a chemoattractant secreted from the oocyte and thereby reach ...
Sperm - See Also
... Ejaculation Female sperm Female sperm storage Polyspermy Semen Sperm competition Sperm donation Sperm granuloma Spermatogenesis Spermatozoon ...
Sperm Guidance - Potential Clinical Applications
... Sperm guidance by either chemotaxis or thermotaxis can potentially be used to obtain sperm populations that are enriched with capacitated spermatozoa for in vitro fertilization procedures ... also be exploited as a diagnostic tool to assess sperm quality ...
Sperm Chemotaxis in Mammals
... Sperm chemotaxis was later also demonstrated in mice (Giojalas and Rovasio, 1998 Oliveira et al ... In addition, sperm accumulation in follicular fluid (but without substantiating that it truly reflects chemotaxis) was demonstrated in horses (Navarro et al ... A key feature of sperm chemotaxis in humans is that this process is restricted to capacitated cells (Cohen-Dayag et al ...