Which of the following is a defining characteristic of traction epiphyses?

A defining characteristic of traction epiphyses is that they serve as origins or insertions for muscles and tendons. These specific epiphyses are located at the ends of long bones and are adapted for the attachment of muscles, allowing for movement and leverage in the skeletal system. This functional role highlights their importance in facilitating muscular actions, which is fundamental in activities such as walking, running, and jumping.

While traction epiphyses may be associated with weight-bearing activities due to their location and function, they are not exclusive to weight-bearing bones. Additionally, they do not play a primary role in joint articulation—the surfaces of bones at joints are specifically designed for that purpose. Finally, traction epiphyses do not primarily account for the blood supply to the bones; rather, that function is primarily handled by the nutrient arteries and the periosteum surrounding the bones. Thus, the correct answer reflects the role of traction epiphyses in muscle attachment, distinguishing them in function from other types of epiphyses.