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A Handbook of Biology

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Nutrition is the process of obtaining and utilising of energy rich nutrients

(food) by an organism. Food consists of carbohydrates, proteins, fats

(lipids), vitamins, minerals and water. Food provides energy for life

activities, materials for growth, maintains body temperature and repairs

tissues. The water plays an important role in metabolic processes and

prevents dehydration of the body.

HÜMÅÑ DÏGËSTÏVË SÝSTËM

Mouth

Buccal cavity

Pharynx

Oesophagus

Stomach

Small intestine

Large intestine

Anus

ALIMENTARY CANAL

DIGESTIVE GLANDS

Salivary glands

Gastric glands

Liver

Pancreas

Intestinal glands

The human digestive system

ÅLÏMËÑTÅRÝ ÇÅÑÅL (GÜT)

It includes the following parts:

MØÜTH:

To receive the food (ingestion).

TËËTH :

The tooth is made up of three structures basically.