BiologySurya · Class 2-3
Dil khoon ko kaise bhejta hai?
Daudne ke baad dil zor se kyun dhadakta hai?
Socho pehle… phir dekho jawab
Kyunki daudte waqt sharir ko zyada khoon chahiye hota hai — isliye dil tez-tez pump karta hai.
Dil ek pump hai jo khoon ko naseein (khoon ki chhoti nalियाँ) ke through poore sharir mein bhejta hai.
Khoon sharir ke har hisse tak khaana aur hawa (oxygen) le jaata hai, taaki haath-pair aur dimaag sab kaam kar sakein.
Kyun tez dhadakta hai jab daudte hain? Kyunki muscles ko zyada oxygen chahiye hota hai, toh dil zyada khoon bhejta hai.
Ghar pe try karo
1 minute chup baithke apni dhadkan haath se seene par gino. Phir 1 minute jagah par kudo, aur dobara gino. Farak dekho.
Wow!
Tumhara khoon poore sharir ka ek chakkar lagbhag ek minute mein poora kar leta hai!
Mummy-Papa ke liye
Aaj bachche ke saath dhadkan pehle chup baithke, phir kudne ke baad ginwaiye aur farak poochiye.
3 sawaal
- Khoon kaise safar karta hai?
Jawab dekho
Naseein ke through. Khoon naseein (blood vessels) ke through safar karta hai.
- Khoon sharir ko kya deta hai?
Jawab dekho
Khaana aur oxygen. Khoon har hisse ko khaana aur oxygen deta hai.
- Daudne ke baad dil kaisa dhadakta hai?
Jawab dekho
Tez. Muscles ko zyada oxygen chahiye, isliye dil tez dhadakta hai.
NCERT se jodo: NCERT Class 3 EVS — hamara sharir