Protein Proteins are the basis of many animal body structures (e.g. muscles, skin and hair). They also form the enzymes that control chemical reaction throughout the body. Each molecule is…
Carbohydrates Carbohydrates may be classified as monosaccharides, or polysaccharides depending on the number of monomer (sugar) units they contain. They constitute a large part of foods such as rice, noodles,…
Nutrients There are six major classes of nutrients: Carbohydrates, Fats, Minerals, Protein, Vitamins and Water. These nutrient classes can be categorized as either macronutrients (needed in relatively large amounts) or…
Photosynthesis Photosynthesis is a chemical process that converts carbon dioxide into organic compounds, especially sugars, using the energy from sunlight. Photosynthesis occurs in plants, algae and many species of bacteria,…
The biotic or the living components of the ecosystem are divided into two categories Autotroph and Heterotroph. Let us read about them in detail. Autotrophs Autotrophs are those organisms that are capable…
Introduction of Nutrition and Digestive System Nutrition (also called Nourishment or aliment) is the provision, to cells and organisms, of the materials necessary (in the form of food) to support…
Active Immunization (Vaccination) People had observed in the past that individuals who recovered from certain diseases are protected for life time from recurrences. This gave rise to the concept of…
Types of Immunity There are two main types of immunity (i) Natural or innate (i.e. genetic, form birth), and (ii) Acquired (i.e. developed during lifetime) A. Natural or Innate Immunity…
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