food and nutrition

Topics: Nutrition, Metabolism, Digestion Pages: 4 (1093 words) Published: December 5, 2013

Food and Nutrition Assignment

Submitted by: Azka Khan
Submitted to:
Topic: Types of Food

Types of Food

Food is any substance normally eaten or drunk by living things. The term food also includes liquid drinks. Food is the main source of energy and of nutrition for animals, and is usually of animal or plant origin. There are 4 (four) basic food energy sources: fats, proteins, carbohydrates and alcohol. Historical development

Humans are omnivorous animals that can consume both plant and animal products. We changed from gatherers to hunter gatherers. After the experience of the Ice Age it is probable that humans wanted to create some feeling of security by controlling what plants were growing and which animals were available. This led to agriculture, which has continually improved and altered the way in which food is obtained.

In order to understand how we can enjoy greater health and wellbeing, we need to understand something about food. There are four essential groups of food. For health and wellbeing we require food from all the groups. The purpose of this page is to stress that ALL four groups of food are essential to health and wellbeing. Even though we may be encouraged to eat less fat, this page stresses that the body requires at least some food from each of the groups every day. Many foods contain more than one group of food, and milk contains all groups of food. Food is often classified as:

1. Carbohydrate, including Fibre
2. Protein
3. Fat
4. Vitamins and Minerals

Carbohydrates are substances that contain carbon, hydrogen and oxygen. They are used in the body to produce energy. They include sugars and starches. Carbohydrates are usually obtained from plant sources. They are broken down in the body to form glucose, and any that is not immediately required in stored in the liver and muscles as glycogen. Plants use carbohydrates to build structures and store any excess as starch,...
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