Final answer:
A structural change in the tissue caused by injury or disease is known as a lesion.
Step-by-step explanation:
A structural change in the tissue caused by injury or disease is known as lesion. Lesions can occur in various tissues and can be characterized by different features depending on the type and location of the injury or disease. For example, muscle atrophy is a type of lesion characterized by a decrease in muscle size due to nonuse or certain medical conditions like cancer and AIDS. It is important to understand how tissues respond to damage in order to develop strategies for repair and regeneration.