The chest cavity (‘thorax’) is the area enclosed by your ribs, from below your neck and shoulders. Its floor is the diaphragm, a wide, thin dome of muscle a little above your waist. Below the diaphragm is the abdomen.
Most of the chest cavity is filled with two large, spongy lungs. The lungs are roughly cone-shaped, [...] http://bit.ly/b0p8CX
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