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10 fakta du bör veta om spermer

Spermatozoon (plural: spermatozoa) med sperma eller fullständigt vetenskapligt namn är den reproduktiva cellen som tillhör manliga individer.

Produktionen av dessa celler i testiklarna börjar under puberteten. Det bär ärftlig information (DNA) att det ska överföring till ägget under befruktning i huvudet delar upp. Han har en svans och han rör sig. Hos människor släpps cirka 150-200 miljoner spermier under en parning. Men, bara en spermie cell kan gödra ägget. När en sperma når en äggcell (oocyte), lämnar den sin svans utanför för att komma in i ägget och passerar den ärftliga informationen till äggen. Spermer finns i en tät vätska. Namnet på denna vätska är sperma (Ersuyu), ejeculate eller vanligen används i form av sperma.

Huvudet av Spermatozoen liknar bagaren skyffel och innehåller ärftlig information. Det finns en struktur som kallas Akzoroma som sveper huvud delen som ett lock och innehåller de enzymer som krävs för spermatozoside att passera genom ägget cell väggen. När spermie cellen når ägget frigörs enzymerna i det akropoformade membranet, vilket gör att spermatozoerna kan komma in i ägget. N antal manliga DNA-material som kommer i kombineras med ett antal kvinnliga DNA-material och består av 2n antal DNA-material (denna cell kallas Zygote). Sedan, i Zygote, cellerna börjar att föröka sig genom att dividera. X-och Y-kromosomer som bärs av Spermatozoas i köns bildningen är avgörande. När den kvinnliga reproduktiva cellen bär X-kromosomer, hälften av de manliga köns cellerna X och den andra halvan bär Y-kromosomen. Om den kvinnliga reproduktiva cellen göds spermie med X-kromosomen, blir kromosomerna xx, och könet på individen blir kvinnlig, medan om spermie som bär Y är befruktat, blir köns tillhörighet av individen manlig. Det finns dock vissa undantag. såsom XXY, X0 kan också förekomma med ärftliga sjuka individer.

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