What is the only jointless bone in your body?

The only jointless bone in the human body is the hyoid bone. It is a small, horseshoe-shaped bone that is located in the neck between the chin and the thyroid cartilage. The hyoid bone is unique because it is not directly connected to any other bone in the body. Instead, it is connected to muscles and ligaments that help support the tongue and aid in speech and swallowing. The hyoid bone is also important for forensic investigations as it can be used to determine the age and sex of an individual.