Routes of Exposure - Inhalation involves exposure through which organ system?

Routes of Exposure - Inhalation involves exposure through which organ system?

• A. Lungs and respiratory tract
• B. Skin
• C. Digestive system
• D. Bloodstream

Answer: (A)

Inhalation exposes the body through the respiratory system—the lungs and airways. When you breathe, airborne contaminants enter via the nose or mouth and travel down the respiratory tract: through the trachea into the bronchioles and ultimately the alveoli where gas exchange occurs. Some inhaled substances deposit on airway surfaces or dissolve in mucus and are cleared, while gases and fine particles can diffuse into the bloodstream from the alveoli. So the primary site for inhalation exposure is the lungs and respiratory tract. The other options describe different exposure routes (skin for dermal exposure, digestive system for ingestion, bloodstream as a transport pathway rather than a route of entry).

Inhalation exposes the body through the respiratory system—the lungs and airways. When you breathe, airborne contaminants enter via the nose or mouth and travel down the respiratory tract: through the trachea into the bronchioles and ultimately the alveoli where gas exchange occurs. Some inhaled substances deposit on airway surfaces or dissolve in mucus and are cleared, while gases and fine particles can diffuse into the bloodstream from the alveoli. So the primary site for inhalation exposure is the lungs and respiratory tract. The other options describe different exposure routes (skin for dermal exposure, digestive system for ingestion, bloodstream as a transport pathway rather than a route of entry).