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ID number:410427
 
Evaluation:
Published: 26.02.2009.
Language: Latvian
Level: Secondary school
Literature: 2 units
References: Not used
Extract

Apaugļošanās notiek dzimumakta rezultātā, kad vīrieša spermatozoīdi ejekulācijas rezultātā nokļūst sievietes makstī.

Spermatozoīdi no maksts nokļūst dzemdes dobumā un no tā — olvadā. Apaugļošanās notiek olvada paplašinājumā, kur apaugļošanos gaida sievišķā dzimumšūna (olšūna).

No 50—200 mij. spermatozoīdu, kas izdalās dzimumaktā, olšūnu sasniedz tikai nedaudzi, bet olšūnā parasti iekļūst tikai viens.…

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