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“Excretory” System
 
 

 

 

 

 


 
 
Text Box: How it works: 1) Our blood is filtered through tiny tubes in kidneys. 2) Hungry – when dinnertime, body sends out signals to show low on nutrients. 3) When a person eats, the epiglottis closes off the air tube and the food goes down the esophagus. 4) Large intestine has 2 main jobs. It moves fluids and salt from materials that come from the small intestine. It also ejects the solid waste that remains. What Body Parts are Included: 1) Lungs – get rid of carbon dioxide and water vapor when you exhale 2) Kidneys – get rid of extra water, salt, and waste in blood – leaves as urine (click the word kidneys to play a game) 3) Skin – gets rid of water, salt, and waste – leaves as sweat 4) Large Intestine – wide tube where water is absorbed and wastes are eliminated 5) Small Intestine – a small tube (winding) where digestion is completed and the blood empties into large intestine, absorbs nutrients What System Needs to Work Properly: 1) Pores and sweat glands to dispose of liquids 2) Plenty of sleep, eat healthy, and exercise Interesting facts/info. 1) Blood passes through kidneys 300 times a day 2) Nephrons clean all your blood in 45 minutes 3) Kidneys 10 cm + 8 cm wide, shaped like a bean 4) Body removes 1.5 liters of waste a day 5) The body gets rid of natural gasses, which can be fatal if not released from the body How the System Prevents Diseases: 1) Urinating 2) Sweating (gets rid of salt wastes)  

 

 

 

Bibliography: The Digestive and Excretory Systems by: Susan Dudley Gold   Copyright year: 2004

The Excretory System by: Dr. Alvin Silverstein, Virginia Silverstein, and Robert Silverstein Copyright year: 1994

Discovery Works by: Houghton Mifflin Science  Copyright year: 1996
 

Lyndsay C., Katelyn M., Noah B., Chance O., Daniel P.
 

http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookEXCRET.html