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411 Excretory System
Term | Definition |
---|---|
excrete - | to release waste |
excretory system - | removes wastes from the body often used to refer specifically to the urinary system |
Major structures of the urinary system - | kidneys, ureters, urinary bladder, urethra |
order of urinary system structures - | Kidneys, ureters, bladder, urethra |
Kidneys - | You have two They filter urea out of the blood They also filter out excess water This urea and excess fluid forms urine |
Ureters - | Carry urine from the kidneys to the bladder |
bladder - | stores urine until it is excreted |
Urethra - | tube leading from the urinary bladder to the outside of the body |
Nephron - | functional unit of the kidney There are about a million in each kidney It is the nephrons that filter out urea and excess water from the blood |
Urea - | a waste product produced by cells it contains nitrogen, so it is also referred to as nitrogenous waste |