viernes, 18 de febrero de 2011

Bladder: A hollow organ that stores urine.
Bowman’s capsule: A cup-shaped structure around the glomerulus that collects the filtered substances; part of the nephron.
Dialysis: A medical procedure in which blood is filtered with the help of a machine.
Excretion:The process of removing wastes and excess water from the body.
Filtration: The process of filtering substances from blood in the glomerulus.
Glomerulus: Part of the nephron; a cluster of arteries that filters substances out of the blood.
Homeostasis: The ability to maintain a stable internal environment despite external changes.
Kidney: Organ that filters the blood and forms urine.
Kidney stones: Crystals of dissolved minerals that form in urine inside the kidneys.
Nephrons: The structural and functional units of the kidneys; includes the glomerulus, Bowman’s capsule, and renal tubule.
Reabsorption: The return of needed substances in the filtrate back to the bloodstream.
Renal tubule: A long, narrow tube surrounded by capillaries that reabsorbs many of the filtered substances and secretes other substances; part of the nephron.
Urea: The main waste nitrogen in the urine of mammals. It is produced in the metabolism of proteins.
Ureter: Tube-shaped structure that brings urine from the kidneys to the urinary bladder.
Urethra: A muscular tube that carries urine out of the body.
Urinary system: The organ system that makes, stores, and gets rid of urine.
Urine: The liquid waste product of the body that is excreted by the urinary system.

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