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ID number:946975
 
Evaluation:
Published: 27.06.2006.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Gametoģenēze notiek dzimumdziedzeros no primārajām dzimumšūnām – spermatogonijiem un oogonijiem.
Spermatoģenēze (spermatozoīdu attīstība) notiek sēkliniekos – ieapaļos ķermeņos, ko veido gari, izlocīti kanāliņi. Kanāliņu sieniņās ir primārās dzimumšūnas – spermatogoniji, kas intensīvi dalās. Pieauguša cilvēka sēkliniekos katru dienu var veidoties desmitiem miljonu spermatozoīdu.
Spematoģenēzē izšķir:
vairošanās;
augšanas;
nogatavošanās;
formēšanās periodus.

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