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the liquid found in the pleural cavity that acts as a lubricant.
a pure substance made of only one type of atom. An element cannot be broken down into simpler...
a type of nuclear division during which somatic cells divide into new cells for growth or to...
regions in particular geographical locations with similar climates and vegetation types.
regions or bundles of vascular tissue consisting of xylem and phloem separated by cambium.
a connected network of vessels and glands, which carry lymph throughout the body.