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the cone-shaped region of the renal medulla, made up of the loops of Henlé and the collecting tubules of nephrons.
atmospheric gases, especially carbon dioxide, methane, nitrous oxide, ozone and water vapour,...
the tube that carries urine from the nephrons to the ureter via the renal pelvis.
(also called a glacial age) a long period of low temperature on Earth, during which large sheets...
dormant, tough and non-reproductive structure that remains dormant until conditions become...
a special kind of biological identification key which consists of sets of organised pairs of...