Stock Photo: OSTEOPOROSIS, ILLUSTRATION. OSTEOPOROSIS, ILLUSTRATION Structure of the bone affected by osteoporosis spongy cancellous bone. A bone is composed of compact tissue in the periphery and of spongious tissue at the center. See images 1581307 for the healthy vertebra, 1581507, 1581707 and 1926307 for the osteoporotic vertebra, 1581207 for the comparison of the two.