Which method of poisoning involves contact through the skin?

The method of poisoning that involves contact through the skin is absorption. This occurs when toxic substances penetrate the skin's layers and enter the bloodstream, leading to systemic effects. Common examples of poisonous substances that can be absorbed through the skin include certain chemicals, pesticides, and heavy metals.

In contrast, injection refers to the direct introduction of substances into the body via a needle, which bypasses the skin barrier entirely. Inhalation involves the inhalation of toxic gases or vapors into the lungs, which then enter the circulatory system, while ingestion pertains to swallowing poisonous substances. Each of these methods relies on different pathways for poisons to affect the body, but absorption specifically highlights the significance of skin contact as a route for poison entry.