Final answer:
The hyoid bone is the only non-articulating bone in the human body, not forming a joint with any other bone.
Step-by-step explanation:
The only non-articulating bone in the human body is the hyoid bone. Unlike other bones in the skeleton, the hyoid is unique because it does not form a joint with any other bone. It is positioned in the front of the neck, between the chin and the thyroid cartilage, and is anchored by muscles from the neck and lower jaw. The hyoid bone supports the muscles of the tongue and is involved in swallowing and speech. While the mandible, or lower jawbone, is often confused as non-articulating because it is the only movable bone of the skull, it does in fact form joints at the temporomandibular joints (TMJ).