Answer: - Cartilage is not present during intramembranous ossification. It is also an essential process during the natural healing of bone fractures and the rudimentary formation of bones of the head- Visceral cranium mostlyProcess Overview:- Mesenchyme cell in the membrane become vascualrized to form osteochondral progenitor cell;osteochondral progenitor cell specialized to become osteoblast- Osteoblast produce bone matrix and surrounded collagen fiber and become osteocyte- As the result process trabeculae will develop- Osteoblast will trap trabeculae to produce bone- Trabeculae will join together to produce spongy cell- Cells in the spongy cell will specialize to produce red bone marrow- Cells surrounding the developing bone will produce periosteum- Osteoblasts from the Periosteum on the bone matrix will produce compact bone