MEHAU KULYK / SCIENCE PHOTO LIBRARY MEHAU KULYK / SCIENCE PHOTO LIBRARY
Lower spine and pelvis. Coloured X-ray of healthy human lumbar spine (lower back) and pelvic girdle. At top can be seen the 11th and 12th floating ribs on either side of the thoracic vertebrae. Below these are the five lumbar vertebrae (L1 at top, L5 at lower centre). Beneath L5 is the top of the sacrum attaching to the large pelvic bones (lower left and right, yellow). These bones support the abdominal cavity which contains the liver, stomach and the intestine.
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