कोशिका

thumb|300px|koshika
Cell (aangrezi:Cell) is lekh mean manav sharir se sanbandhit ullekh hai. manav sharir asankhy sookshm ikaeeyoan se milakar bana hai, jinhean koshikaean kaha jata hai. koshika sharir ka sookshmatam roop hai. yah sharir ki ek moolabhoot rachanatmak evan kriyatmak ikaee hai, jo svatantr roop se jivan ki kriyaoan ko chalane ki kshamata rakhati hai. sharir ke vibhinn aangoan ki koshikaoan mean bhinnata hoti hai, parantu samast koshikaoan ki moolabhoot sanrachana ekasaman hi hoti hai. ye itani sookshm hoti haian, ki inhean bina maikroskop ke dekh sakana sambhav nahian hai. inhean sten karane ke pashchath slaid par sthit karake hi dekha ja sakata hai. sten karane se koshika ke bhinn-bhinn bhag bhinn-bhinn rang grahan kar lete haian tatha sabhi spasht evan ek-doosare se bhinn dikhaee dene lagate haian. koshika ki rachana ke aantargat kee-ek sammilit aang haian, inhian aangoan ke samoohik roop ko koshika kahate haian. karyoan ki vibhinnata ke karan koshikaoan ke akar evan akriti mean aantar hota hai, parantu kuchh rachanatmak vishisht gun un sabhi mean saman rahate haian.

koshika ki rachana

praytek koshika ke nimn tin mukhy bhag hote haian-

1. koshika kala ya bhitti
2. koshikadravy
3. kendrak

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panne ki pragati avastha

adhar

prarambhik

madhyamik

poornata

shodh