Question
Which are the three common routes through which humans are exposed to the toxicants. Discuss any one in detail.
Answer :
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Humans are commonly exposed to toxicants through three major routes: ingestion, inhalation, and dermal (skin) absorption. Ingestion involves the intake of toxic substances through food, water, medicines, or accidental swallowing of chemicals. Inhalation occurs when toxic gases, vapors, fumes, dust, or aerosols are breathed into the lungs. Dermal exposure happens when toxicants come into contact with the skin and penetrate through it into the systemic circulation. Among these, inhalation is one of the most significant routes of exposure, especially in occupational and environmental settings. Inhalation exposure occurs when air contaminated with toxic substances is inhaled through the nose or mouth and enters the respiratory tract. Due to the large surface
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