Bursitis is best defined as which of the following?

Bursitis is best defined as an inflammatory condition of the bursa, which are small, fluid-filled sacs located throughout the body that help reduce friction between tissues such as bones and tendons or muscles. When these bursae become inflamed, it leads to pain and discomfort, typically around joints like the shoulder, elbow, hip, or knee.

Knowing this definition helps to clarify the nature of bursitis and its specific focus on the bursa. The correct option reflects the precise anatomical structure affected by the condition, distinguishing it from other inflammatory or degenerative conditions that involve different types of tissues or structures, such as joint capsules, muscle tissue, or bone tissue. Understanding this helps in diagnosing and managing bursitis effectively in the context of physical therapy and rehabilitation.