results in development of anatomical structure development cranial skeletal system development 2016-01-07T13:45:06Z cranial skeleton development craniofacial development biological_process cranium development GO:1904888 The process whose specific outcome is the progression of a cranial skeletal system over time, from its formation to the mature structure. The cranial skeletal system is the skeletal subdivision of the head, and includes the skull (cranium plus mandible), pharyngeal and/or hyoid apparatus. osteocranium development cranial skeletal system