NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,176 terms related to cancer and medicine.
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- listen (PLOOR-uh)
- A thin layer of tissue that covers the lungs and lines the interior wall of the chest cavity. It protects and cushions the lungs. This tissue secretes a small amount of fluid that acts as a lubricant, allowing the lungs to move smoothly in the chest cavity while breathing.