The impact of exogenous substances on tissues can be varied and depends on several factors including the nature of the substance, the duration of exposure, and the organism's defense mechanisms. Some potential effects include:
Inflammation: A common response to harmful substances, leading to tissue swelling and redness. Cellular Damage: Direct injury to cells, which can result in necrosis or apoptosis. Fibrosis: The formation of excessive fibrous connective tissue as a reparative response to injury. Carcinogenesis: Long-term exposure to certain exogenous agents can lead to the development of cancer.
