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erythropoietin (EPO) |
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A hormone secreted by the kidney to stimulate the production of red blood cells by bone marrow |
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Cortex |
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Outer region; the renal cortex is the outer region of the kidney |
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Calyx/Calix |
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Cup-like collecting region of the renal pelvis |
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Filtration |
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Passive process whereby some substances, but not all, pass through a filter or other material. In the kidney, blood pressure forces materials through the filter (glomerulus). |
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Glomerulus/Glomeruli |
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Tiny ball of capillaries (microscopic blood vessels) in cortex of kidney |
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Medulla |
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Inner region; the renal medulla is the inner region of the kidney |
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Micturition |
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Urination; the act of voiding |
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Nephron |
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Combination of glomerulus and renal tubule where filtration, reabsorption, and secretion take place in the kidney. |
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Nitrogenous Waste |
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Substance containing nitrogen and excreted in urine |
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Reabsorption |
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In this process, the renal tubules return materials necessary to the body back into the bloodstream |
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Renal Pelvis |
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Central collection region in the kidney |
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Renal Tubule |
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Microscopic tube in the kidney in which urine is formed after filtration. |
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Renin |
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An enzymatic hormone synthesized, stored and secreted by the kidney; it raises blood pressure by infuencing vasoconstriction (narrowing of blood vessels) |
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Urination |
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Process of expelling urine; also called micturition |
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Voiding |
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Emptying of urine from the urinary bladder; urination or micturition |
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