DIAGRAM: BONE: Endochondral ossification bone growth series, 1-6 of 14; A=Cartilage Template, B=Perichondrium, C=Capillary, D=Periosteal Bone Collar, E=Periosteum, F=Calcified Cartilage, G=Cavities within Matrix, H=Calcified Matrix, I=Marrow Cavity, J=Vascular Tissue -- PICTURE 1-Cartilage templates (A) form