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hollow tubular vascular tissue cells, strengthened with lignin that conducts water and mineral salts between roots, stems and leaves.
the small amount of air that always remains in the lungs during breathing.
(also called the stele) the region that includes the pericycle and the vascular tissues in a...
a blood vessel that returns oxygenated blood from the lungs to the left atrium of the heart.
(also called renal failure) the condition in which the kidneys are no longer able to function...