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Excretory System
vocab.
8
Biology
7th Grade
12/18/2008

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Term
excretion
Definition
The removal process for bodily wastes.
Term
urea
Definition
A chemical that comes from the breakdown of proteins.
Term
kidney
Definition
As kidneys filter blood to remove urea and other wastes, they help maintain homeostasis by regulating the amount of water in your body.
Term
urine
Definition
A watery fluid that contains urea and other wastes.
Term
ureter
Definition
Two narrow tubes that carry urine from the kidneys to the urinary bladder.
Term
urinary bladder
Definition
A sacklike muscular organ that stores urine.
Term
urethra
Definition
Urine leaves the body through a small tube called the urethra.
Term
nephron
Definition
Each kidney contains about a million tiny filtering units callen nephrons.-
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