MedicalBhanu · Class 4-5
Saans ka safar aur sardi ki dhundh
Hum hawa andar lete hain, par oxygen khoon mein kaise pahunchti hai — aur gandi hawa is safar ko kaise bigaadti hai?
Socho pehle… phir dekho jawab
Hawa naak se saans ki nali mein, phir phephdon ki bahut chhoti-chhoti thailiyon tak jaati hai. Wahan oxygen khoon mein chali jaati hai. Hawa mein dhuaan aur bahut baarik dhool ho, toh woh bhi is raaste mein ghusne ki koshish karti hai.
Raasta: naak → gala → saans ki nali (windpipe) → do phephde → karodon chhoti thailiyan. In thailiyon ki deewar bahut patli hoti hai, isliye oxygen wahan se khoon mein chali jaati hai aur carbon dioxide bahar aa jaati hai.
Suraksha team: naak ke baal badi dhool rokte hain, balgam dhool ko chipka leta hai, aur saans ki nali ke bahut chhote baal (cilia) us balgam ko gale ki taraf upar dhakelte rehte hain. Par dhuaan ke sabse baarik kan is team se bhi bach kar andar tak ja sakte hain.
Cause-effect: sardi mein thandi, ruki hui hawa dhuaan ko zameen ke paas phansa leti hai, isliye Dilli jaise shehron mein dhundh badhti hai. Aise dino mein bade bahar ka zor ka khel kam karwate hain, aur saans mein takleef ho toh doctor ko dikhate hain — khud se koi ilaaj nahi.
Ghar pe try karo
Bade ke saath do safed tissue lo. Ek ghar ke andar, ek sadak ki taraf wali khidki par 2 din rakho (ek halki cheez se dabaa do taaki ude nahi). Phir dono ka rang milao — kis par zyada dhool jami?
Wow!
Phephdon ki saari chhoti thailiyon ko khol ke bichha do, toh woh lagbhag aadhe tennis court jitni jagah gher lengi!
Mummy-Papa ke liye
Aaj bachche ke saath andar-bahar wala tissue experiment shuru kijiye aur 2 din baad dono ka rang saath milaiye.
3 sawaal
- Oxygen khoon mein kahan jaati hai?
Jawab dekho
Phephdon ki chhoti thailiyon mein. Phephdon ki chhoti thailiyon ki patli deewar se oxygen khoon mein jaati hai.
- Cilia kya karte hain?
Jawab dekho
Balgam aur dhool ko gale ki taraf upar dhakelte hain. Saans ki nali ke chhote baal (cilia) balgam aur dhool ko upar dhakelte hain.
- Sardi mein dhundh zyada kyun hoti hai?
Jawab dekho
Thandi, ruki hawa dhuaan ko neeche phansa leti hai. Thandi, ruki hawa dhuaan ko zameen ke paas phansa leti hai.
NCERT se jodo: NCERT Class 5 EVS (Looking Around) — hamara sharir aur saans