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Medical Terminology
Chapter 7 - Urinary System
| Term | Definition |
|---|---|
| arteriole | small artery |
| calyx ; calix | cuplike collecting region of the renal pelvis |
| catheter | tube for injecting or removing fluid |
| cortex | outer region of an organ |
| creatinine | nitrogenous waste excreted in urine |
| electrolyte | chemical element that carries an electrical charge when dissolving in water |
| erythropoietin | hormone secreted by the kidney to stimulate production of res blood cells by bone marrow |
| filtration | process whereby some substances pass through a filter |
| glomerulus capsule | enclosing structure surrounding each glomerulus : also called the Bowman capsule |
| glomerulus | tiny ball of capillaries the kidney |
| hilum | depression in the part of an organ where blood vessels and nerves enter and leave |
| kidney | one of two bean-shaped organs that filter nitrogenous waste from the bloodstream to form urine |
| meatus | opening or canal |
| medulla | inner region of an organ |
| nephron | the functional unit of the kidney where filtration, reabsorption and secretion take place |
| nitrogenous waste | substance containing nitrogen and excreted in urine |
| potassium (K+) | an electrolyte regulated by the kidney |
| reabsorption | renal tubules return materials necessary to the body back into the bloodstream |
| renal artery | blood vessel that carries blood to kidney |
| renal pelvis | central collection region in the kidneys |
| renal tubules | microscopic tubes in the kidney where urine is formed after filtration |
| renal vein | blood vessel that carries blood away from the kidneys |
| renin | hormone secreted by the kidney that raises blood pressure |
| sodium (Na+) | an electrolyte regulated in the blood and urine by the kidneys |
| trigone | triangular area in the urinary bladder |
| urea | major nitrogenous wasted excreted in the urine |
| ureter | one of two tubes leasing from the kidneys to the urinary bladder |
| urethra | tube leading from the urinary bladder to the outside of the body |
| uric acid | nitrogenous waste product excreted in the urine |
| urinary bladder | hollow, muscular sac that holds and stores urine |
| urination (voiding) | process of expelling urine, |