जैव प्रक्रम: जीवन कैसे बना रहता है

Video narration

Aap roz khana khate hain aur saans lete hain, par ye dono aapke sharir ko jeevit kaise rakhte hain? Hare paudhe sooraj ki roshni ki madad se apna bhojan banate hain, jabki jaanvar bhojan bahar se lete hain. Bhojan se sharir ko zaroori padarth milte hain; bhojan lena aur uska upyog karna poshan hai. Shvasan mein bhojan se urja nikalti hai, jisse sharir ke kaam chalte hain. Lekin sirf khana aur saans lena kaafi nahi, sharir ko zaroori padarth pahunchane aur apashisht bahar nikalne ki bhi zaroorat hai. Parivahan, yani padarthon ko sharir ke alag-alag hisson tak pahunchana, ye kaam karta hai. Aur sharir mein bane apashisht ko bahar nikalna utsarjan kehlata hai. Saans se mili oxygen ke saath bhojan se urja nikalti hai. To jawab hai: bhojan aur oxygen se sharir kaam karta hai, parivahan zaroori padarth pahunchata hai aur utsarjan apashisht hatata hai. Isi tarah jeevan bana rehta hai.