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the liquid found in the pleural cavity that acts as a lubricant.
the clearing of large areas of natural forest, mainly to free up land for agriculture and or...
the region of the kidney where the renal artery enters, and where the renal vein and the ureter...
a sac-like structure in plant cells that contains the cell sap. It supports the cell and helps...
animal wastes (particularly urine) that contain materials high in nitrogen.