ClipArt ETC
Cross section of developing bone of human fetus of four months. Labels: a, periostem; b, boundary between endochondral and periosteal bone; c, perichondral bone; d, remains of area of calcification; e, endochondral bone; f, f', blood vessels; g, g', developing Haversian spaces; h, marrow; i, blood vessels.

Developing Bone

Cross section of developing bone of human fetus of four months. Labels: a, periostem; b, boundary between…

Nucleated none cells (osteoblasts) and their processes, contained in the one lacunae and their canaliculi respectively. From a section through the vertebra of an adult mouse.

Osteoblasts

Nucleated none cells (osteoblasts) and their processes, contained in the one lacunae and their canaliculi…