This means some mammals may have sesamoid bones when even members of the same species don't. One such example is the lateral fabella, which is behind the knee and can be found in an average of 36. ...

View Full Profile. Learn about our Editorial Policies. Textbooks will tell you that the human body contains 206 bones. But sometimes, there are 208. The fabella, a small bone in a tendon behind the ...

Dr. Michael Berthaume, Reader in Engineering at King's College London and author of the study The lateral fabella is a sesamoid bone behind the knee which is twice as common in people with knee ...