Human anatomy. Computer artwork of the upper half of a human skeleton. The arteries (red lines), veins (blue lines) and nervous system (white lines) 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). The lungs are within the ribcage. The trachea (windpipe), larynx and thyroid gland are seen in the neck and the brain is in the skull.