Poisons may enter the body in several different ways. Which process describes poisons that enter the body by absorption?

The process that describes poisons entering the body by absorption is when they pass through the skin or mucous membranes. This method of entry involves the poison coming into contact with a surface and being taken up directly into the bloodstream or tissues, often through the skin or through membranes found in areas like the eyes or mucous membranes of the nasal passages.

Absorption is particularly relevant in situations where toxins come into contact with the skin or mucosa, which can occur through direct exposure to hazardous materials, chemicals, or certain organic substances. This mode of poisoning can lead to systemic effects because the absorbed toxins can quickly distribute through the body via the circulatory system.

Other methods listed, such as swallowing or inhaling, describe different pathways for poison to enter the body—ingestion and inhalation, respectively. Additionally, poison being injected describes a different type of entry where the substance is directly introduced into the body rather than being absorbed transdermally. Thus, the process of absorption specifically refers to the route where poisons penetrate the skin or mucous membranes, making this the correct answer.