In humans, infiltration can occur through several routes:
Dermal Absorption: The skin acts as a barrier, yet certain chemicals can penetrate it, especially if they are penetration enhancers. Inhalation: Toxicants in aerosols or gases can infiltrate the respiratory tract, leading to systemic distribution. Ingestion: Chemicals can infiltrate the digestive system and enter the bloodstream through the gastrointestinal tract.
