Video narration
Roti ka yeh nivaala pet mein pahunchkar hamare sharir ke kaam kaise aata hai? Sabse pehle, munh mein daant ise chabakar chhote tukdon mein badal dete hain aur laar ise bhigokar prarambhik roop se todti hai. Yeh yantrik pachan hai. Niglane par nivaala bhojan nali se hokar pet mein pahunchta hai; bhojan nali ka kaam ise pahunchana hai, pachana nahin. Pet ki maanspeshiyan ise marodti hain aur pachak ras tatha enzyme bhojan ko rasayanik roop se aur chhote, ghulansheel padarthon mein todte hain. Yahin soch badalti hai: pachan keval pet mein nahin rukta. Chhoti aant mein pachan poora hota hai. Pacha hua bhojan wahan se rakt mein jaane lagta hai - ise avshoshan kehte hain. Phir badi aant bacha paani sokhti hai, aur shesh apashisht mal bankar baahar nikalta hai. To roti ka nivaala poore pachan tantr mein poshak tatv bankar rakt tak pahunchta hai, baaki baahar nikalta hai.