| (subclass HeadBone Bone) | Anatomy.kif 52-52 | Head bone is a subclass of bone |
| (subclass CranialBone HeadBone) | Anatomy.kif 57-57 | Cranial bone is a subclass of head bone |
| (subclass FacialBone HeadBone) | Anatomy.kif 99-99 | Facial bone is a subclass of head bone |
| (subclass InnerEarBone HeadBone) | Anatomy.kif 168-168 | Inner ear bone is a subclass of head bone |
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