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The food we eat mostly consists of large and complex molecules of carbohydrates,fats , proteins etc.
The complex food molecules cannot pass across the walls of small intestine for absorption into blood .in order to get food absorbed into blood for it's transport to every part of body ,it is first broken down into smaller diffusible pieces which can pass across the walls of small intestine.
The process during which large and complex food molecules are broken down into such smaller pieces which pass across the walls of small intestine and absob into blood is called digestion of food .The complex digestion of food comprises of two processes .ie., physical digestion and chemical digestion.
⚫Physical digestion ▪️▪️▪️▪️▪️▪️
🕳️The crushing of large food molecules into smaller pieces is called physical digestion
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⚫Chemical digestion.▪️▪️▪️▪️▪️▪️▪️▪️
🕳️ The change of non_diffusible food molecules into diffusible or soluble food molecules with the helps of some chemical substances (enzymes) is called chemical digestion▪️
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