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Biology IX | Health and Diseases | Part 2
Health and Diseases | Part 2 Disease caused by bacteria Tuberculosis (T.B.) Tuberculosis (T.B.) was first discovered by Robert Koch in 1882. It is caused by a bacterium called Mycobacterium tuberculosis. The bacterium releases a toxin called tuberculin. T.B. can affect all parts of the body. In human beings, the infection spreads by inhaling infected…
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Biology IX | Health and Diseases | Part 1
Health and Diseases | Part 1 Human Diseases Definition : Disease may be defined as a disorder in the physical, physiological, psychological or social state of a person caused either due to nutritional deficiency, hormonal disorder, genetic disorder, pathogen or any other reason. Types of Diseases Diseases are broadly grouped into two categories : a.…