Mitotic figures within lacunae can be seen in bone but not in cartilage. Cartilage can grow appositionally but bone cannot. Bone contains more and larger proteoglycans than does cartilage. Type II collagen is present in cartilage, but not in bone. It is poorly vascularized.
Macrophages are characteristically present.
Type I collagen. The cellular content may be variable. Type II collagen fibers. Myosin thick filaments. Both contain Type II collagen.