ABSTRACT
Lead is a ubiquitous material that exists naturally in the Earth's crust. As a result, all of us take in a certain amount of lead as a result of our daily activities. Lead can enter the body through inhalation or ingestion. Inorganic lead does not easily penetrate the skin, so this route is considered an insignificant route of exposure. However, organic forms such as tetraethyl lead used in gasoline can penetrate the skin and contribute to the body burden of lead.
