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NUTRITION - PowerPoint PPT Presentation


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NUTRITION. WHY DO WE NEED FOOD?. Growth & Repair Energy Health. There are 5 food groups: Dairy Meat, legumes and nuts Vegetables Fruits Grains *Additional: Fatty and sugary foods. The Food Pyramid. DAIRY : Provides us with Calcium Essential vitamins (A & B12) and Nutrients

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Presentation Transcript
slide2

WHY DO WE NEED FOOD?

Growth & Repair

Energy

Health

  • There are 5 food groups:
  • Dairy
  • Meat, legumes and nuts
  • Vegetables
  • Fruits
  • Grains
      • *Additional: Fatty and sugary foods
slide4

DAIRY :

  • Provides us with Calcium
  • Essential vitamins (A & B12) and
  • Nutrients
  • Source of protein
  • Important for healthy bones etc ….
  • MEAT, LEGUMES & NUTS :
  • Provides Protein
  • B Vitamins
  • Iron, Magnesium & Zinc
  • Important for bones, muscles, blood etc…
slide5

VEGETABLES :

  • Packed with vitamins (e.g. B, C, K etc…)
  • & minerals (e.g. Iron, sodium, calcium etc)
  • -Source of fiber
  • -Reduces the risk of cancer

FRUIT :

-Provide you with all essential nutrients

-Rich in Vitamins A and C

-Good source of fiber

GRAINS :

-Carbohydrates

- Contain lots of vitamins and minerals

-Good source of fiber

-Provides Energy

slide6

Deficiency Diseases

NIGHT BLINDNESS

SCURVY

RICKETS

  • Vitamin C
  • Gums & Skin bleed
  • Vitamin A
  • Cannot see at night
  • Vitamin D
  • Soft bones
slide7

BERI BERI

ANAEMIA

PELLAGRA

  • Vitamin B Complex
  • Numbness
  • and weakness
  • Vitamin B Complex
  • Scaly skin,
  • headaches
  • Iron
  • Tiredness,
  • weakness &
  • pale skin
slide8

THE DIGESTIVE SYSTEM

Why do we need to digest food?

What is digestion?

- Breakdown of food compounds into simpler forms.

Monosacharide

Disacharide

PROTEINS

Polysacharide

CARBOHYDRATES

slide9

Process of Digestion

4 Stages

Mechanical Digestion

Chemical Digestion

Absorption

Defecation

slide11

Pathway of food

Mouth – Mechanical and Chemical Digestion

Oesophagus – Mechanical Digestion

Stomach – Mechanical and chemical Digestion

4. Small Intestine – Absorption

5. Large Intestine – Absorption

6. Rectum – Defecation

7. Anus - Defecation

Liver – produces bile

Pancreas – produces enzymes and insulin

slide12

The Liver

  • Largest internal organ in the body
  • Processes simple digested compounds
  • Stores Glucose as Glycogen
  • Removes poisons and dead cells
  • Converts harmful substances e.g. Alcohol