घ्राण तंत्र

ghran tantr (aangrezi: Olfactory system) nasika ghran ka aang haian. usake bhitar ki donoan guhaean nasasurang (nasal cauiities) kahalati haian. ye age ki or nasadvaroan se praranbh hokar pichhe grasanika (pharynx) tak chali gee haian. in donoan ke bich mean ek vibhajak patal hai, jo oopar ki or jharjharika (ethmoid) ki madhy plet se oopar aur niche ki or vomar (Vomer) ya sirik asthi ka bana hua hai. is phalak par romak shleshmal kala chadhi huee hai, jo nasa ke parshvoan par ki kal se mil jati hai. is kala ke phalak par chadh hue bhag ke keval oopari kshetr mean dhranatantrika ke ve tantu phaile hue hai jo gandh ko grahan karake mastishk mean keandr tak pahuanchate haian.

sanrachana

nasika ka bahari bhag oopar ki or asthi ka aur niche ka keval maansanirmit hai, jo tvacha se daba hua hai aur nasapaksh (Alanasii) kahalata hai. madhy vibhajak phalak par oopar niche sip ke akar ki mu di huee patali patali tin asthiyaan lagi huee haian, jo oordhv, madhy aur adho shuktibhaean kahalati haian. oordhv shuktibha ke oopar ka sthan jatook jharjharika dari kaha jata hai. usake pichhe ke bhag mean jatook vayuvivar ka mukh khulata hai. oordhv aur madhyashuktibha ke bich mean oordhv kuhar haian, jisamean jharjharika ke kuchh vayukosh khulate haian. madhy aur adhoshuktibha ke bich ka gahara aur vistrit at:sthan madhyakuhar haian, jisamean lalatasthi (Frontal) aur adhohanvasthi ke vayuvivaroan (air sinuses) ke chhidr sthit haian. donoan vivaroan mean yahian se vayu pahuanchati haian. sankraman bhi yahian se pahuanchata hai. adhoshuktibha ke niche ka sthan adhokuhar kaha jata hai. yahaan adhoshuktibha ke niche, usase dhaka hua nasanalika ka chhidr hai. is karan vah shuktibha ko hatane ya katane par hi dikhaee deta hai. is surang ki chhat sankuchit hai, jahaan nasa ki parshvabhitti madhyaphalak se mil jati hai. yahaan se madhyaphalak ke oopari bhag mean phaile hue tantrikatantu jharjharasthi ke sushir patt (Cribriform Plate) mean hokar oopar ko ghranakand (Olfactory bulb) mean chale jate haian.

kary

nasika ka kam gandh ka jnan karana hai, jo ghranakriya dvara hota hai. gandh ka anubhav karana uparyukt un tantrikatantuoan ka kam hai jo madhyaphalak par achchhadit shleshmal kala ke oordhv bhag mean phaile hue haian. jab kisi vastu ka ghran sanbandhi jnan prapt karana hota hai tab usake bhinn bhinn shakti ke vilayan bana lie jate haian aur unako prithakh‌ prithakh‌ parikshan nalikaoan mean bharakar, sabase adhik shakti ka vilayan pahale suanghaya jata hai. phir kam shakti ke vilayan suanghae jate haian. is prakar vah nyanatam matra maloom ki jati hai, jisako vyakti sooangh sakata hai. jab vyakti sadharan jal aur vilayan ki gandh mean aantar nahian kar pata to usase pahale ki matra nyoonatam hoti hai. aise hi prayogoan dvara maloom kiya gaya hai ki japharan ki 1/10,00,00,000 ratti ko sooangha ja sakata hai.

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