Nutrition is the physical and chemical process by which an organism uses std test kit food to support its normal life. It involves absorption, digestion, assimilation, production, catabolism, and exocytosis. Nutritional needs of an individual differ from the needs of other people because different nutritional requirements depend on the type of body tissue being used. This in turn determines the nutrient intakes for a person.
The primary components of nutrition are carbohydrates, proteins and fat. These provide the energy required by the body. Carbohydrates or starches are converted into glucose in the liver. In order to store up glucose, the human body breaks down carbohydrate-rich foods like rice, potatoes, bread, cereals and pasta. The other common food source for carbohydrates is vegetables.
There are two broad categories of diets: physiological and nutritional. Physiological nutrition refers to the intake of food and beverages, meeting specific requirements such as those for growth and development. Under physiological nutrition, the main sources of nutrients are carbohydrates, proteins, vitamins and minerals. The other category of diets is called homotrophic nutrition, which considers only nutrients that are needed for the production of cells and organisms.
Nutrition is an important activity in all living things including animals and plants. Various processes take place throughout the life cycle of an organism to maintain its normal growth, development and function. Different types of organisms have different requirements for nutrition. Plants need carbohydrates, protein, fats, and mineral ions for respiration, while animals require a variety of substances for reproduction, growth, and maintenance.
In terms of energy production, there are two types of nutrition: autotrophic nutrition, which provide energy in the form of glucose during aerobic respiration; and heterotrophic nutrition, which provide energy in the form of amino acids, glucose or other nutrients. The primary source of nutrition for an organism is autotrophic nutrition, which is composed of proteins, carbohydrates and other substances necessary for cell division and repair. The secondary source of nutrition isheterotrophic nutrition, which consists of substances that support the growth and maintenance of an organism even in the absence of oxygen.
A balanced diet is an essential part of a healthy lifestyle. By making educated food choices and adding appropriate vitamins, minerals and nutrients to the diet, many health problems can be reduced or eliminated completely. A balanced diet should include a wide range of foods from different food groups and all of the major food categories. Nutrient dense foods provide the most energy and nutrients for maintaining health.