Human anatomy. Computer artwork of a human skeleton dancing. The arteries (red lines), veins (blue lines) and the male reproductive system are shown. The small (inner) and large (outer) intestines are seen in the abdomen. Above these are the stomach (orange), gall bladder (green) and liver (red). Behind the ribs are the lungs. The organs are deformed by the movement of the skeleton. In front of the neck is the thyroid gland.