The Skull bones are formed by intramembranous ossification. Ossification continues postnatally, through puberty until mid 20s.
Osteoblasts manufacture bone and are derived from mesodermal in origin.
Occurs in many tissues of the embryo and adult. In adult, found on surface of bone joints. Connects centrally with the dorsal horn of the spinal cord. Ectoderm ventrally is relatively thin, gaining its dermatome component at a later stage. Consists if fibers and ground substance.