Which of the following is a sesamoid bone?

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Multiple Choice

Which of the following is a sesamoid bone?

A sesamoid bone is a small bone embedded within a tendon at a joint, acting as a pulley to redirect force and reduce friction. In horses, the proximal sesamoid bones sit at the fetlock joint as part of the suspensory apparatus. The option that names the bone type itself—sesamoids—correctly identifies these structures. The navicular bone is a distinct hoof bone behind the coffin joint, the long pastern bone (P1) is a different bone, and the cannon bone is the large metacarpal/metatarsal. So, the term that properly names the bone category here is sesamoids.

A sesamoid bone is a small bone embedded within a tendon at a joint, acting as a pulley to redirect force and reduce friction. In horses, the proximal sesamoid bones sit at the fetlock joint as part of the suspensory apparatus. The option that names the bone type itself—sesamoids—correctly identifies these structures. The navicular bone is a distinct hoof bone behind the coffin joint, the long pastern bone (P1) is a different bone, and the cannon bone is the large metacarpal/metatarsal. So, the term that properly names the bone category here is sesamoids.

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