Cartilaginous condensations and the events taking place within them.
D000818:Animals; D001846:Bone Development / Q000502:physiology*; D002356:Cartilage / Q000196:embryology / Q000502:physiology*; D005121:Extremities / Q000196:embryology / Q000502:physiology; D006801:Humans; D010012:Osteogenesis / Q000502:physiology*