C26 Digestion In Human

26.1 Why We Need Food? ,[object Object],[object Object],[object Object],[object Object],[object Object]

26.2 What is in the Food We Eat? ,[object Object],[object Object],[object Object]

Main types of nutrients ,[object Object],[object Object],[object Object],[object Object],[object Object]

Main types of nutrients ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

26.3 Why Must Food be Digested? ,[object Object],[object Object],[object Object],[object Object],[object Object]

26.3 Why Must Food be Digested? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Nutrients like starch, proteins and fats, are large, complex molecules. They cannot pass through the cell membrane. Nutrients like glucose and amino acids, are small, soluble molecules. They can pass through the cell membrane.

26.4 What are Enzymes? ,[object Object],[object Object],[object Object]

“ Lock and key” hypothesis active sites Enzyme molecule Food molecule Enzyme-food complex Enzyme free to take part in next reaction. Two products leave the enzyme. Product X Product Y

Types of digestive enzymes ,[object Object],[object Object],Amino acids Proteins Protease Fatty acids and glycerol Fats Lipase Glucose (simple sugar) Maltose Maltase Maltose (a complex sugar) Starch Amylase Digested products(s) Acts on Class of enzyme

26.5 The Human Digestive System ,[object Object],[object Object],[object Object],[object Object]

26.5 The Human Digestive System ,[object Object],[object Object]

26.5 The Human Digestive System salivary gland mouth cavity oesophagus stomach salivary glands pancreas colon rectum anus large intestine liver gall bladder small intestine

The mouth food oesophagus windpipe

The mouth ,[object Object],[object Object],[object Object],[object Object]

The oesophagus Muscles contract to push the food ball down. Muscles relax, and the tube widens for food to move.

The oesophagus ,[object Object],[object Object],[object Object],[object Object],[object Object]

The stomach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The small intestine, liver and pancreas gall bladder liver small intestine pancreas

The small intestine ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Pancreas ,[object Object],[object Object],[object Object],[object Object],[object Object],lipase

Pancreas ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],amylase in pancreatic juice maltase protease

Liver ,[object Object],[object Object],[object Object],[object Object],[object Object]

Emulsification Bile Large oil drop Small oil droplets

Absorption in the small intestine ,[object Object],[object Object],[object Object],[object Object]

The large intestine large intestine rectum anus

The large intestine ,[object Object],[object Object],[object Object],[object Object],[object Object]

Miscellaneous ,[object Object],[object Object],[object Object],[object Object],[object Object]

C26 Digestion In Human

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