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Topic : Excretory System Aim : Describe parts & functions of the Excretory System. http://www.youtube.com/watch?v=CL78yNLlLmo. Function. Removal of metabolic (cellular) wastes from the body. Metabolic wastes: CO 2 , H 2 0, salt, nitrogenous wastes (urea). PARTS OF THE EXCRETORY SYSTEM.
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Topic: Excretory System Aim: Describe parts & functions of the Excretory System.
Function • Removal of metabolic (cellular) wastes from the body
Metabolic wastes: CO2, H20, salt, nitrogenous wastes (urea)
Lungs • Excrete CO2 & H2O vapor CO2 & H20 vapor
Skin • Excrete urea, salt & water in sweat (perspiration)
Temperature regulation • Evaporation of sweat from skin cools body Maindex
Liver • Produces UREA • Released into blood and then moves to kidneys
Detoxification = waste products, toxins, and drugs removed from the blood
Kidneys a. Filter wastes from blood
b. Maintains water balance in body c. Produces urine
Did you know… • About 440 gallons of blood flow through the kidneys each and every day! • If you eat a lot of red beets, your urine will actually be colored red. • The average person passes 9,202 gallons of urine in his/her lifetime. That’s enough to fill 315 bathtubs.
Kidneys • Blood filtered • Urine produced
Ureters • Transport urine from kidneys to bladder
Urinary Bladder http://www.youtube.com/watch?v=uAy5C2YYlbk • Muscular organ that stores urine
Urethra • Tube that leads urine out of the body