Sesamoid bones described as 'sesame seed' is which term?

• A. Sesamoid bones
• B. Short bones
• C. Flat bones
• D. Irregular bones

Answer: (A)

Sesamoid bones are tiny bones that form within tendons, typically where a tendon passes over a joint and experiences friction or tension. Their shape looks like a sesame seed, which is why they’re called sesame‑seed shaped bones—that name describes both their appearance and their function. A well-known example is the patella, which sits within the tendon of the quadriceps and helps protect the tendon while improving its mechanical advantage. This is distinct from short bones (roughly cube-shaped, like some wrist and ankle bones), flat bones (thin and curved, like ribs or skull bones), and irregular bones (with complex shapes, like vertebrae).