dc.description |
The human body is subjected to numerous chemical exposures from the external environment. The atmosphere is the largest component of this environment, and the lungs are the largest surface exposed to this environment. Protecting the lungs from exposures to hazardous chemicals in the environment is often more difficult than protecting the human body from ingestion and dermal absorption hazards. Hazardous chemicals enter the body through the lungs in both the occupational and domestic environments. Among the substances frequently inhaled with air are an array of gases, aerosols, and particulates from natural and anthropogenic sources. In addition, some humans occasionally inhale therapeutic and/or abused drugs. |
en |