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Urinary System

Vocabulary

TermDefinition
Arteriole Small artery
Calciferol Active form of vitamin D, secreted by the kidney
Calyx or Calix (plural: Calyces or Calices) Cup-like collecting region of the renal pelvis
Catheter Tube for injecting or removing fluids
Cortex Outer region of an organ
Creatinine Nitrogenous waste excreted in urine
Electrolyte Chemical element that carries an electrical charge that dissolved in water
Erythropoietin (EPO) Hormone secreted by the kidney to stimulate that production of red blood cells by bone marrow
Filtration Process whereby some substances, but not all, pass through a filter
Glomerular Capsule Enclosing structure surrounding each glomerulus
Glomerulus (Plural: Glomeruli) Tiny ball of capillaries (microscopic blood vessels) in the kidney
Hilum Depression in an organ where blood vessels and nerves enter and leave
Kidney One of two bean-shaped organs on either side of the backbone in the lumbar region
Meatus Opening or canal
Medulla Inner region of an organ
Nephron Combination of glomerulus and renal tubule where filtration, reabsorption, and secretion take place in the kidney
Nitrogenous Waste Substance containing nitrogen and excreted urine
Potassium (K+) Electrolyte regulated by the kidney so that a proper concentration is maintained within the blood
Reabsorption Process whereby renal tubules return materials necessary to the body back into the bloodstream
Renal Artery Blood vessel that carries blood to the kidney
Renal Pelvis Central collecting region in the kidney
Renal Tubule Microscopic tube in he kidney where urine is formed after filtration
Renal Vein Blood vessel that carries blood away from the kidney and toward the heart
Renin Hormone secreted by the kidney; it raises blood pressure by influencing vasoconstriction (narrowing of the blood vessels)
Sodium (Na+) Electrolyte regulated in the blood and urine by the kidneys; needed for proper transmission of nerve impulses, heart activity, and other metabolic functions
Trigone Triangular area in the urinary bladder
Urea Major nitrogenous waste excreted in urine
Ureter One of the two tubes leading from the kidneys to the urinary bladder
Urethra Tube leading from the urinary bladder to the outside of the body
Uric Acid Nitrogenous waste excreted in the urine
Urinary Bladder Hollow, muscular sac that holds and stores urine
Urination (Voiding) Process of expelling urine; also call micturition
Created by: gallo.mandy
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