
nasika chhidra

nasika chhidra (yaa naris, bahuvachan "nares") naak key dou chhidron mein seey ack haye. way naak guhaaon key madhyam seey havaa aur anya gasses key pravesh aur nikas koo saksham karate hain. pakshiyon aur standhaariyon mein, unamen shakha vaali haddiyaan yaa upaasthi hoti hain jinhen turbinate kahaa jaataa haye, jinka kaary shwas lene parr havaa koo germ karna aur shwas chhodane parr namee koo nikaalana haye. machhaliyan naak key madhyam seey saans naheen letee hain, lekin unamen dou chhote chhed hotey hain (lekin cyclostome ack mein mill jaate hain) jinka upayog soonghane key liye kiya jaataa haye, jinhen nasika key roop mein bhee jaanaa jaa sakata haye.
manushyon mein, naak chakr pratyek nasika kii rakt vaahikaon kaa samanya ultradian chakr haye joe soojan mein sanlagn hoe jaataa haye, phir sikud jaataa haye.
naasikaaen septum dwara alag kii jaati hain. kabhi-kabhi septum vichalit hoe sakata haye, jisase ack nasika dusare seey badee dikhaai detee haye. septum aur kolumela koo atyadhik nuksan key saath, dou nasika abb alag naheen hotey hain aur ack badaa baahari dwaar banaate hain.
anya tetrapod kii tarah, manushyon key dou baahari naasikaaen (poorvavarti naasikaaen) aur dou atirikt naasikaaen nasika guha key peechhe, sir key ander (pashch naasikaaen, pashch nasika chhidra yaa choana) hoti hain. way naak koo galey (nasika-grasni) seey bhee jodate hain, jisase shwasan mein sahaayata milati haye. haalaanki sabhi chaar naasikaaen aadhunik tetrapod key jaleey poorvajon key sir key baahar theen, lekin baahar jaane vaale paani (bahirgaman nasika) key liye naasikaaen munh key ander chully gaeen, jaisa kii 395-million-varsh purani jeevaashm machhali "kenichthis campabelli" kii khoj seey pataa chalata haye joe iss pravaas koo pragati mein dikhaati haye. isake saamane key daanton key beach dou naasikaaen hoti hain, joe praarambhik charan mein maanav bhroon key samaan hoti hain. yadi yeye judane mein whiffle rahate hain, tou parinam ack daraar vaalaa taaloo hotaa haye.
pratyek baahari nasika chhidra mein lagbhag 1,000 naak key baal hotey hain, joe parag aur dhool jaise videshi kanon koo chhaanane kaa kaam karate hain. 
manushyon key liye dou nasikaon mein alag-alag ghraan input kii gandh lena aur doorbeen pratidvandvita key samaan ack avdhaaranaatmak pratidvandvita kaa anubhav karna sambhav haye jaba donon aankho key liye dou alag-alag input hotey hain.
procalariform anya pakshiyon seey unake nasika key tubeler vistaar key kaaran alag hotey hain.
hathaude key sir vaali shark kii tarah vyaapak roop seey doori vaale nasika, gandh key srot kii disha nirdhaarit karane mein upayogi hoe sakate hain.

