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a thick layer inside the primary cell wall. It consists mainly of cellulose, hemicellulose and lignin, and makes the cell walls rigid and waterproof.
the liquid produced by the kidneys consisting mainly of water and nitrogenous wastes such as...
a muscular structure on the floor of the mouth of most vertebrates, which manipulates food for ...
coiled nephron tubule which extends from Bowman's capsule to the loop of Henlé.
the region of the kidney where the renal artery enters, and where the renal vein and the ureter...
strengthened, elongated xylem cells that conduct water.