ऊतक
(aangrezi:Tissue) is lekh mean manav sharir se sanbandhit ullekh hai. saman gunoan vali, ek hi akar ki tatha ek hi kary karane vali koshikaoan ke samooh ko ootak kahate haian.
jaisa ki jnat hai ki manav ek bahukoshiy prani hai, jisamean koshikaean rachana tatha kary mean ek-doosare se bhinn hota haian. ek prakar ki koshikaean, ek hi prakar ka kary karati haian aur ek hi varg ke ootakoan jaise- asthi, upasthi, peshi adi ka nirman karati haian. sankshep mean saman rachana tatha saman karyoan vali koshikaoan ke samooh ko ootak kahate haian. pratyek ootak ka apana vishisht kary hota hai. ootakoan ka nirman karate samay koshikaean apas mean ek-doosare se ek vishesh antarakoshiki padarth ke dvara ju di aur sambandhit rahati haian. bahut se ootak milakar sharir ke aangoan, jaise- amashay, gurde, yakrit, mastishk adi ka nirman karate haian. pratyek aang ka bhi apana vishisht kary hota hai. vibhinn aang paraspar milakar kisi sansthan ka nirman karate haian jo kisi vishesh kary ko karata hai, jaise-nak, svarayantr, shvas pranal evan pheph de milakar shvasan sansthan (tantr) ka nirman karate haian, jo ki sharir evan vayumandal ke bich aauksijan evan karban daiaauksaid ka adan-pradan karata hai.
manav sharir ka nirman nimnalikhit prarambhik ootakoan ke milane se hota hai-
- upakala ootak
- sanyoji ootak
- peshi ootak
- tantrika ootak
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