Explain The Difference Between Chemical And Mechanical Digestion

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Breaking down digestion
The digestion process is a combination of chemical and mechanical digestion. Chemical digestion breaks down food via a chemical change, in which the digestive juices and enzymes break down food into components small enough to enter the GI tract, the blood cells or the lymph cells. Mechanical digestion breaks down food via chewing or grinding in the mouth as well as via the muscular activity in the stomach and intestines. Both types of digestion begin in the mouth.
The mouth and stomach perform both chemical and mechanical digestion.

Nutrition is the process of taking in organic substances and minerals for the seven life processes. E.g. energy for growth and tissue repair. A person is described as malnourished if their diet is not balanced. This may lead to a person being obese, overweight or underweight. Balanced diet involves consuming the seven nutrient groups in the correct proportions, this is also known as ‘good nutrition’. The seven nutrient groups are; carbohydrates, protein, fat, vitamins, minerals, fibre and water.
The small intestine, which is approximately 10 feet long, is the site of most nutrient absorption. The inside surface of this organ contains numerous folds, covered by very thin, long projections on the inside of the intestinal wall called villi.

The small intestine is where final digestion and absorption occur.
♣ The small intestine is a coiled tube up to 6 meters long and 2-3 cm wide.
♣ Coils and folding plus villi give

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