Hour 8 Human Digestive System Part I

HUMAN DIGESTIVE SYSTEM

NUTRITION

The process of food procurement is called nutrition.

FOOD :

Any substance which provides either energy or growth material or both.

NUTRIENTS :

There are 5 nutrients in our food namely-

• Proteins
• Carbohydrates
• Fats
• Vitamins
• Minerals

STEPS OF NUTRITION

The process of nutrition includes 5 steps :

1.  Ingestion
2.  Digestion
3.  Absorption
4.  Assimilation
5.  Egestion

Organs of Gastrointestinal (Gl) tract :

• Mouth
• Pharynx
• Esophagus
• Stomach
• Small intestine
• Large Intestine
• Rectum
• Salivary glands
• Liver
• Pancreas
• Gastric glands
• Intestinal glands