Answer :
Chemicals enter the body and personal safeguards against hazardous chemical exposure through four major routes - inhalation, ingestion, absorption and injection.
Inhalation is air pollutants that are inhaled directly into the lungs through the nose or mouth. These contaminants include dust, mist, smoke, vapors, and gases. Inhalation is the most common route by which chemicals enter the body.
Ingestion involves dangerous chemicals entering the body through the mouth. This includes inhaled and swallowed chemical dusts, particles and mists, or contaminants such as hands, food and tobacco.
Absorption includes hazardous chemicals absorbed through direct contact with skin or eyes. These chemicals include particulates (dust, smoke), liquids, gases, and vapors.
Injections can result from needle misuse or accidental chemical contamination of shardsof glass or other sharp objects.
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