It consists of tiny bars and plates the form an irregular gridlike pattern. In living bone, these space would contain red bone marrow. The spongy bone here is irregularly porous, and even inculdes large holes. This could indicate osteoporosis. Osteoblasts and osteoclasts 4.
Osteoblasts function in forming new bone.
Thsy remove soluble calcium and phasphate from the blood, and deposit them as calcium phosphate on thin collagen fibers of the bone matrix. Osteoclasts are located on the surface of the bone and remove bone by secreting enzymes and acids that dissolve the solid calcium phosphate, and as a result, release calcium and phosphate back into the blood. In osteoporosis, new bone is deposited more slowly than it is removed by osteoclasts. Anywhere that osteoblasts are located. It is found most often in the leg bones, hips, and vertebrae.