12 terms

Excretory System (Standard 7.L.1.4)

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excretory system
the system which eliminates cellular (metabolic) wastes from the body; includes respiratory system, integumentary system, and urinary system.
alveoli
incredibly small sacs found inside the lungs where the exchange of gases takes place
sweat gland
located in the skin, a gland that eliminates concentrated urea and excess salts from the body as part of cooling the body down
homeostasis
a state of balance between the processes of the body
kidneys
two kidney-bean shaped organs responsible for filtering the blood
nephron
location of true filtering of the blood; millions are found inside each kidney
renal artery
the blood vessel that carries urea to the kidneys for filtering
renal vein
the blood vessel that carries filtered blood from the kidneys back to the heart
liver
although considered a digestive system organ, this organ plays a role in the excretory system by forming urea and uric acid from the breakdown of proteins and sending it to the kidneys to be removed from the body
metabolism
all the chemical reactions that take place in an organism's cells
urea
a chemical waste that comes from the breakdown of proteins in the liver and is filtered out of the blood in the kidneys
urine
waste product made of water, urea, and inorganic salts and forms in the kidneys

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