Welcome to Joanne's Sec 1 Home Economics .
Unit 2 Nutrients in Food
Objectives
Nutrients, their functions and sources
Water
Dietary fibre
Vitamins
| Functions | Sources | Deficiency symptoms |
| Vit A- Needed for healthy skin and eyes |
Green vegetables, orange and yellow -fleshed fruit , vegetables, milk, egg yolk and liver |
skin became dry and scaly,night blindness |
| Vit B-To release energy from food for the body's use |
Green vegetables, whole grains,pulses, eggs, meat,
fish milk and cheese |
Gets irritatd easily Loss of appetite |
| Vtt C- Heals wounds and to resist infections |
Fruit especially cutrus fruit and green vegetables | Wounds take a longer time to heal and bleeding gums General tiredness |
| Vit D- Builds strong bones and teeth |
Fish lliver oil, egg yolk and milk,Sunlight | Bones and teeth are poorly formed Growth retardation in children |
Minerals
| Functions | Sources | Deficiency Symptoms |
| Calcium & Phosphorus Builds strong bones and teeth |
Canned sardines,eggs ikan bllis meat milk |
Bones may become soft,weak and brittle Increased risk of fractures |
| Iron - Helps red blood cells to function properly |
Green leafy vegetables , liver red meat | The person is pale. General feeling of weakness and tiredness |
| Iodine Regulates the body's use of enegy |
Crab , prawns ,seaweed | The person becomes sluggish and gains weight Enlarged throid glands ( goitre) |
| Sodium - Helps to maintain the water balance in the body | Canned meat , salt, salted fish, sauces |
Suffers from muscle cramps in the legs and abdomen |
| Functions | Sources | |
| Water | Keeps the body temperature constant Assist in the removal of waste matter from the body Helps in the digestion and absorption of nutrients Needed for the blood to carry oxygen to different parts of the body |
Any liquid form from food and soups |
| Dietary fibre( part of food which cannot be digested.) | To move bowels and help the body to get rid of waste matter | Fruit, vegetables, pulses, nuts and wholegrain cereals |