Which statement best describes an inhalation exposure?

Which statement best describes an inhalation exposure?

• A. Involves the digestive system
• B. Involves the nervous system
• C. Involves the circulatory system
• D. Involves the respiratory system

Answer: (D)

Inhalation exposure means a hazard is breathed in, so the respiratory system is the primary route. When a person inhales a gas, vapor, or aerosol, it enters through the nose or mouth and travels to the lungs, where it can irritate airways and alveoli and may pass into the bloodstream. That’s why respiratory protection and good ventilation are key defenses for inhalation hazards. Ingestion involves the digestive system, and while some inhaled substances can later affect other body systems after absorption, the defining route for inhalation exposure is the respiratory system.

Inhalation exposure means a hazard is breathed in, so the respiratory system is the primary route. When a person inhales a gas, vapor, or aerosol, it enters through the nose or mouth and travels to the lungs, where it can irritate airways and alveoli and may pass into the bloodstream. That’s why respiratory protection and good ventilation are key defenses for inhalation hazards. Ingestion involves the digestive system, and while some inhaled substances can later affect other body systems after absorption, the defining route for inhalation exposure is the respiratory system.