Classes of food: Food is any substance which when taken into the body of living organism is capable of maintaining growth and development. It regulates the body functions and controls harmful or dangerous substances that might enter into the body.
Classes of food
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Classes of food
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Meaning of Food
Food is any substance which when taken into the body, serves to nourish and build up tissues as well as provide needed energy.
Importance of Food
Food is important for the following reasons:
- Food eliminates hunger
- It provides energy for various physical activities
- It enhances growth
- It is a resistance to disease
- Food makes one to recover from illness
- It serves as a source of income
- It is eaten for the purpose of adequate nutrition
- Food makes for healthy living
Classes of Food
There are six classes of food, namely:
- Carbohydrates
- Proteins
- Fats and oil
- Mineral salts
- Vitamins
- Water
Classes of food
Why are they essential to our body?
Although each of the 7 major groups of nutrients performs different and unique functions in our body, they are all essential because they work together and contribute to our good health. The main functions of these major nutrients can be summarized as below:
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Carbohydrates
Carbohydrates are a major source of energy of our body, and they come mainly from grains, such as rice and noodles. Besides, fruit, root vegetables, dry beans and dairy products also contain carbohydrates.
Proteins
Meat, fish, seafood, eggs, dairy products, dry beans and bean products are good sources of protein. Its major functions include building, repairing and maintaining healthy body tissues.
Fats
Fats can be found in foods such as meat, fish, seafood, dairy products, nuts, seeds and oils. Fats serve as an energy source. They prevent heat loss in extreme cold weather and protect organs against shock. They are responsible for making up part of our body cells and transporting fat-soluble vitamins such as vitamin A, D, E and K.
Classes of food
Vitamins
There are many kinds of vitamins from various food groups and they participate in different body metabolism such as maintaining healthy skin and hair, building bones and releasing and utilizing energy from foods. Vitamins can be classified into water-soluble and fat-soluble vitamins.
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Minerals
Minerals are a group of essential nutrients which regulate many body functions such as fluid balance, muscle contraction and transmission of nerve impulses. Some minerals also contribute to body structure and build strong and healthy bones, such as calcium
Dietary fibre
Dietary fibre is the indigestible part found in plant. It helps stabilise blood sugar, promote gastrointestinal health and prevent constipation. Dietary fibre can be classified into soluble and insoluble fibre.
Classes of food
Water
Water is the most abundant substance in human body and is also an essential nutrient to maintain our health. The major functions of water include regulation of body temperature, production of body fluids, transportation of nutrients and removal of waste products.
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Although each nutrient performs different functions in our body, they all work together and contribute to our good health.
EVALUATION
- How many groups can we classify food?
- What are the functions of classes of food?
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