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Sperm cells


The term sperm is derived from the Greek word (σπέρμα) sperma 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...
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A sperm, from the ancient Greek word σπέρμα (seed) and ζῷον (living being) and more commonly known as a sperm cell, is the haploid cell that is the male gamete. It joins an ovum to form a zygote. A zygote is a single cell, with a complete set of chromosomes, that...
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Because sperm cells are haploid, they contribute half of the genetic information ... Sperm cells were first observed by a student of Anton van Leeuwenhoek in 1677. ...
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Find articles about Teens & Preteens and hundreds of other health-related topics at LIVESTRONG.COM, the definitive daily health, fitness, and lifestyle destination...
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Sperm cell The male gamete . The typical sperm of most animals has a head containing the nucleus and acrosome, a middle piece with the mitochondria,
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... usually consisting of a round or cylindrical nucleated cell, a short ... Sperm cells contribute half of the genetic information to the diploid offspring. ...
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However, sperm cells make up only about 3% of the volume of semen, a fluid ... Mature sperm cells are about 0.05 millimetres long, and are made up of a head, ...
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The sex cells, sperm and ova, are produced by meiosis in special tissues of male ... The number of sperm cells produced can be significantly diminished by ...
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Adult stem cells extracted from human bone marrow have been coaxed into becoming male reproductive cells. ... understand more about how sperm cells are created. ...
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As Moreno points out, coaxing stem cells into sperm may be the first step, but ... Men obviously produce millions of sperm cells which contain only the x ...
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RTÉ news brings you the latest Irish news, world news, international news and up to the minute reports on breaking Irish news stories and news from around the ...
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VIDEO: Watch sperm splash in the right direction in research that could lead to ... This gave the sperm cells two options as they're carried through the main ...
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A Sperm Cell or Spermatozoa. Sexual FAQs - Sperm Cell or Spermatozoa The mature sperm cell (spermatozoa) is... cells have 46 chromosomes but sperm have ...
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Some sperm cells are 'better' swimmers than others. Why? ... All normal cells have 46 chromosomes but sperm have half that number or, 23. If ...
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... from Newcastle University describes the generation of sperm cells from embryonic stem cells. ... Creation of sperm from frozen non-sperm cells offers some far ...
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Sperm are the male gamete produced from the germ cell line. The germ cells of the male are called spermatogonia, which oddly means sperm-eggs. ...
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Science and technology news stories tagged with keyword: sperm cells. ... Scientists discover how 'companion' cells to sperm protect them from genetic damage ...
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Scientists know that stem cells from embryos have the potential to develop into ... Most male infertility, Geijsen says, is due to not having enough sperm cells. ...
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... or can develop into more specialized cells -- eventually sperm in this case. ... clearly shown in fruit flies that lost sperm-making stem cells can be replaced, ...
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