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Poisonous and Infectious Substances : These are the substances liable to cause death or serious injuries to health, if swallowed or inhaled or allowed to come in contact with skin. Infectious substances are those contaminated with disease inducing micro-organisms. The examples of poisonous substances are, pesticides, tetraethyllead and many drugs etc. The contaminated hospital wastes, strains of pathogens etc. Are considered infectious substances.
this is a sticky substance that traps dust from the inhaled air
Explain Accessory Organs which help in Digestion The gastrointestinal tract receives various secretions. Some are secreted from the glands in the lining membrane of the organs,
How different pressures of air force water from a container Fit a test tube with a two-hole stopper. By one hole place a length of glass tube which extends into the test tube a
Scurvy Disease occurs due to vitamin C deficiency.
is salt separated by filtration
what are good conductors of heat?why is advantages to have ventilators in houses at the top of walls?
how to overcome river in chain surveying
Introduction : Here you have need to about the fire hazards, various causes of fires and the precautions to be taken to avoid them. You also learnt about various types of fire ext
Explain Colouration of faeces - Functions of Bile The iron-free breakdown products of haemoglobin (i.e. bilirubin and biliverdin) oxidize to brown stereobilin. This stereobilin
Primary source from plants for humans and animals
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