Video narration
Kya aapne socha hai, dhool ya mirch naak mein jaate hi humein chheenk kyun aati hai? Naak ke andar ke receptors is jalan ko mehsoos karte hain. Phir nerves yeh signal dimaag tak bhejti hain, aur chheenk ka reflex shuru ho jaata hai. Jhatke mein zor ki hawa aur mucus bahar nikalte hain, irritant ko saaf karte hue. Isliye chheenk random nahi hoti. Hum chheenk isliye maarte hain taaki naak dhool, mirch ya irritants ko bahar nikaal sake.