Describe the various exposure routes of toxicants in the human body. Explain the distribution and storage of toxins in the human body.

Exposure Routes of Toxicants in the Human Body:

Toxicants, or harmful substances, can enter the human body through various exposure routes. Understanding these routes is crucial in environmental toxicology, as it helps assess the potential health risks associated with different chemicals and pollutants. The primary exposure routes of toxicants in the human body include:

1. Inhalation:
   Inhalation is one of the most common exposure routes for toxicants. When individuals breathe in contaminated air, they can absorb harmful substances directly into their lungs. Gases, vapors, particulate matter, and aerosols are all potential sources of inhaled toxicants. For instance, air pollutants like fine particulate matter (PM2.5), volatile organic compounds (VOCs), and airborne contaminants from industrial processes can be inhaled and subsequently distributed throughout the body via the bloodstream.

2. Ingestion:
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