What is the quickest and most direct route of pesticides into the body?

Inhalation is considered the quickest and most direct route for pesticides to enter the body due to the rapid absorption of chemicals through the lung tissues. The lungs have a large surface area and a rich blood supply, allowing for highly efficient absorption into the bloodstream. When pesticides are inhaled, they bypass several barriers that other routes, such as ingestion or dermal absorption, must pass through.

Ingestion involves the gastrointestinal system, which introduces additional processing and time for the substance to enter the bloodstream. Dermal absorption, while direct, typically involves a longer duration for chemicals to penetrate the skin and reach systemic circulation. Injection is indeed a direct method but is not commonly associated with pesticide exposure in the same way that inhalation is, as it requires a needle or similar device. Therefore, inhalation stands out as the fastest route for pesticide entry into the body.