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sperma

Wikipedia English The Free Encyclopedia

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Sperm
The term sperm refers to the male reproductive cells and is derived from the Greek word (σπέρμα) sperma (meaning "seed"). 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 through TESE. Some sperm banks hold up to of sperm.

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Wikipedia Nederlands De vrije encyclopedie

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Sperma
Sperma is in ruime zin de door de mannelijke dieren geproduceerde vloeistof met geslachtscellen. Bij zoogdieren, waaronder de mens, wordt sperma (ook wel semen genoemd) bij de zaadlozing uit de penis geloosd. De zaadcellen worden aangemaakt in de teelballen en rijpen in de bijballen. Bij de menselijke zaadlozing bevat sperma 1 tot 3% zaadcellen. De rest is vocht, afkomstig uit de prostaat en zaadblaasjes.

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Wikipedia Deutsch Die freie Enzyklopädie

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Sperma
Sperma (altgr. σπέρμα, spérma, „Keim, Same“) ist die Befruchtungsflüssigkeit männlicher Tiere und Menschen. Es setzt sich aus SpermienEpithelzellen der Hodenkanälchen und einer Sekretflüssigkeit zusammen, die als Seminalplasma oder Samenplasma bezeichnet wird.

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Wikipedia Italiano L'enciclopedia libera

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Sperma
Lo sperma è un liquido organico di consistenza liquido-albuminosa, generalmente di colore bianco oppure bianco-perlato, con aspetto opalescente o lattescente, che fisiologicamente contiene cellule germinali dette spermatozoi (tranne nei casi patologici di azoospermia) prodotte nelle gonadi di animali maschi o ermafroditi, e da altre sostanze di natura organica. Il compito dello sperma è la fecondazione dell'ovulo femminile (gamete femminile) e il processo di espulsione dalle vie genitali è detta eiaculazione.

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Српска Википедија – Бесплатна енциклопедија

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Sperma
Sperma (od grčke reči σπέρμα, -{spérma}-, što znači seme) ili ejakulat (od latinske reči -{eicěre}-: izbaciti, odnosno -{eiaculatum}-: ono što je izbačeno) mutna je mlečnobela do bledožuta tečnost koja se pod određenim uslovima izbacuje iz semenih puteva, a sastoji se od spermatozoida, sekreta polnih žlezda i sekreta epididimisa. U pravilu se izbacuje kroz spoljni otvor mokraćne cevi, a ređe u mokraćni mehur. Izbacuje se najčešće za vreme polnoga odnosa ili za vreme samozadovoljavanja. Čak i u snu može doći do izbacivanja sperme. To je tzv. noćna polucija i dešava se obično kada snovi imaju seksualni sadržaj.

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