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Biology and sperm cell production

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Sperm is the male reproductive cell , or gamete , in anisogamous forms of sexual reproduction forms in which there is a larger, "female" reproductive cell and a smaller, "male" one. Animals produce motile sperm with a tail known as a flagellum , which are known as spermatozoa , while some red algae and fungi produce non-motile sperm cells, known as spermatia. Sperm cells form during the process known as spermatogenesis , which in amniotes reptiles and mammals takes place in the seminiferous tubules of the testes. The spermatocytes then undergo meiosis , reducing their chromosome number by half, which produces spermatids. The spermatids then mature and, in animals, construct a tail, or flagellum, which gives rise to the mature, motile sperm cell. This whole process occurs constantly and takes around 3 months from start to finish.

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Biological Processes that Prepare Mammalian Spermatozoa to Interact with an Egg and Fertilize It

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Semen Production | BioNinja

Semen is a fluid secreted by the male gonads and functions as a transport medium for spermatozoa. Structures Contributing to Semen Production. The production of sperm and as a consequence, semen is controlled by three key hormones — FSH, LH and testosterone. Hormonal Control of Male Reproduction. Brent Cornell. Cell Introduction 2. Cell Structure 3.
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Sperm Biology from Production to Ejaculation

NCBI Bookshelf. Molecular Biology of the Cell. New York: Garland Science; In most species, there are just two types of gamete , and they are radically different.
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Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. Sperm are unique cells, produced through the complex and precisely orchestrated process of spermatogenesis, in which there are a number of checkpoints in place to guarantee delivery of a high-quality and high-fidelity DNA product.
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