Final answer:
Abnormal changes in the structure of organs or tissues are called lesions, and they can be primary, secondary, or tertiary depending on the stage of the disease.
Step-by-step explanation:
Abnormal changes in the structure of organs or tissues are called lesions. Lesions can be primary, secondary, or tertiary depending on the stage of the disease. A primary lesion is the initial abnormality, a secondary lesion is a result of progression or complications, and a tertiary lesion is a late-stage manifestation of the disease. For example, in skin diseases, a primary lesion could be a pimple, a secondary lesion could be a scar from scratching the pimple, and a tertiary lesion could be a skin ulcer that develops due to chronic inflammation.
Abnormal changes in the structure of organs or tissues due to disease are referred to as lesions. These changes can be observed in any of the three stages of a disease: primary, secondary, or tertiary, making the correct answer C. Lesions. Lesions can be associated with a variety of conditions and maybe the result of infection, immune responses, and other non-infectious environmental factors. Diagnosing infectious diseases requires consideration of both infectious and noninfectious causes.