The correct answer to this question is Sesamoid bone. This bone is apart of the tendon and can be found in various joints throughout the body. Sesamoid bones are in the shape of a pea, and there are two of them located in the ball of the foot.
They usually are under the joint of the big toe. Sesamoid bones are essential for many reasons. Most importantly, they help the big toe move like it is supposed to. It also is how the big toe can get a jump when walking or running because the toe can push off the Sesamoid bone.
The patella is classified as a sesamoid bone, which is a small irregularly shaped bone, and it is embedded in a tendon or a muscle. The Kneecap, known as the patella, is the largest sesamoid bone in the human body; it is rooted within tendons, and their general purpose would be to protect a joint and the tendon.
There are also sesamoid bones located at the first metatarsal, or the big toe, the vertebrae, sacrum, hand, and mandible. Out of the 206 bones that are in the body, there may be a small percentage of sesamoid bones; however, they are an essential part of the skeletal system.