How can H2S enter the body?

• A. Through inhalation, the skin, and eyes
• B. Through ingestion only
• C. Through inhalation only
• D. Through skin only

Answer: (A)

Hydrogen sulfide can enter the body through multiple routes, with inhalation being the primary pathway because it’s a gas that you breathe into the lungs where it can be absorbed into the bloodstream. It can also be absorbed through the skin, especially with direct contact or when in liquid form, and through the eyes, since mucous membranes are permeable to gases and vapors. Ingestion is not a typical route for H2S exposure in workplace settings, so the combination of inhalation, skin, and eye exposure best reflects how the gas can enter the body.