What is the process of taking in materials through the skin or eyes called?

The process of taking in materials through the skin or eyes is called absorption. This term specifically refers to the way substances can enter the body when they come into contact with skin or mucous membranes, including the eyes. The skin can absorb certain chemicals, toxins, or medications, which then enter the bloodstream or the body's systems. Similarly, materials that contact the conjunctiva of the eyes can also be absorbed into systemic circulation. This definition distinguishes absorption from other processes, such as ingestion (the consumption of substances through the mouth), inhalation (breathing in substances through the respiratory system), and exposure (which refers to being in contact with a substance but does not specify the mechanism of entry into the body). Understanding absorption is crucial in various contexts, especially in hazardous material handling and medical situations, where skin or eye exposure can lead to significant health effects.