Bones formed in tendons near articulations are called what?

• A. Sesamoids
• B. Cartilages
• C. Ligaments
• D. Fascia

Answer: (A)

Bones formed in tendons near articulations are known as sesamoid bones. These small, round bones serve to protect tendons and can help improve the leverage and function of the muscles acting upon the joint. One of the most well-known examples of sesamoid bones is the patella, or kneecap, which develops within the tendon of the quadriceps muscle.

Sesamoid bones are typically found in locations where tendons cross over joints, thereby providing both structural support and a minimal degree of cushioning during movement. They can vary in size and number among individuals, enhancing the efficiency of muscle contractions and joint movement.

Understanding the role of sesamoid bones highlights their importance in biomechanics and the overall function of the musculoskeletal system. This distinguishes them clearly from cartilages, which are flexible tissues, ligaments that connect bones to other bones, and fascia, which is connective tissue that surrounds muscles and organs. Each of these has a different function that does not involve transforming into bony structures like sesamoid bones do.