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DAVRAI TASHAKKULI HUJAYRA

Dar in davr hujayraho shakl va andozai muayyan megirand. Hujayrahoi jinsii modina dar ravandi rasish bo parda pushida shuda, badi purra khotima yoftani meyoz ba bordorshavi omoda megardand.

Dar bisyor mavridho, masalan, dar khazandagon va parrandagon, az hisobi hujayrahoi hujayratukhmro ihota karda, dar atrofi on pardachaho paydo meshavand (rasmi 6.9). Vazifai onho muhofizat kardani hujayratukhm va janin az tasiri sharoiti nomusoidi beruna ast. Ba vositai pardai beruna havo ba darun dokhil meshavad, ammo virusho va bakteriyaho az pardai tukhmi parranda guzashta nametavonand.

davrai-tashakuli-hujayra

Vazifai nutfa ba hujayratukhm dokhil kardani akhbori irsi va baroi inkishof faol gardondani onho ast. Az hamin sabab, badi ba okhir rasidani meyoz hujayrahoi jinsi bozsozii vasero az sar meguzaronand. Majmai Golji dar qismi peshi kanori sarak joygir shuda, ba hissachahoi okhirin, ki akrosoma nom dorand, tabdil meyobad. On fermenthoro judo karda, pardai (membranai) janin (tukhm)-ro hazm mekunad.

Mitokhondriya dar girdi qamchinak paydo meshavad va boloi ham zich joy girifta, gardanakro tashkil mekunad. Nutfai tashakkulyofta inchunin sentriola dorand (rasmi 6.10).

Nutfai hayvonote, ki bo digar sinfho dokhil meshavand, bo baze qismhoi khud metavonand khosiyati sokhtori digarro doshta boshand, vale prinsipi sokhtorashon umumi ast. Mahsuli jinsii rastani ba monandi nutfai hayvonot sitoplazmai kam dorad.

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