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The Excretory System

The Excretory System. Excretory System = Urinary System. How Our Body Eliminates Waste and keeps us healthy!. Function: Removes or excretes excess water, H 2 O, urea, carbon dioxide, CO 2 , and other wastes from our blood. Importance:

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The Excretory System

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  1. The Excretory System Excretory System = Urinary System How Our Body Eliminates Waste and keeps us healthy!

  2. Function: Removes or excretes excess water, H2O, urea, carbon dioxide, CO2, and other wastes from our blood. Importance: Harmful chemicals made when the body creates energy must be removed from blood to keep you healthy

  3. Body Parts that Excrete Waste • Kidneys – filter out excess water, salt and chemicals as urine • Lungs – filter out carbon dioxide, CO2, from the blood. (respiratory system) • Skin – excretes water, as sweat, which contains some trace chemical wastes, including urea. (epidermis)

  4. Liquid Waste = Urine Liquid waste = urine

  5. http://kidshealth.org/kid/htbw/USmovie.html?tracking=K_RelatedArticlehttp://kidshealth.org/kid/htbw/USmovie.html?tracking=K_RelatedArticle

  6. Artery Kidney Vein Ureter Urinary Bladder Urethra

  7. Order Kidney K Ureter B Urethra Ureters Urinary BLADDER Urethra

  8. Kidneys Function - filter wastes and excess water from the blood. Importance – control the amount of water in body, tell body when to make new red blood cells, take harmful chemicals from blood Other Info – located in back under ribs You have 2 kidneys, but can live with 1 Picture

  9. Ureter Function - tubes that take urine from the kidney to the urinary bladder. Importance – after the waste is filtered from blood, it must go to the bladder for storage Other Info – each kidney has its own ureter Picture

  10. Urinary Bladder Function: a sack that stores urine/liquid waste Importance: Holds urine until you go to the bathroom Other Info: when full, a message is sent to your brain telling you to go to the bathroom Picture

  11. Urethra Function- small tube that carries urine out of the body. Importance – connects the bladder to the outside of the body, how urine leave body Other Info – about 6mm wide Picture

  12. Nephrons • Tiny tubes in the kidneys that filter and clean blood and balance supply of water and salt. (about 1 million per kidney)

  13. Exit • The ______________ filter waste and excess water from the blood. • The tube that carries urine out of the body is called the _____________. • The urinary bladder stores ____________ until it is ready to exit the body.

  14. http://www.whyzz.com/why-is-pee-yellow • http://kidshealth.org/kid/htbw/pee.html

  15. Signs of Disease Doctors analyze urine for disease; • Normal urine contains water, urea and trace minerals. • Sugar in urine indicates Diabetes • Protein in urine indicates the kidneys are not working and the person, or animal, is very sick.

  16. Excretory System • Lungs • Skin • Kidneys • Urine • Nephrons • Ureter • Bladder • Urethra

  17. HW review Removes Water = Kidneys, Skin Brings Oxygen to blood = Lungs Removes Salt = Kidneys, Skin Stores Urine = Bladder Removes C02 = Lungs Produces Urine = Kidneys Removes Body Heat = Skin

  18. Today’s Goal • To memorize the functions and order of the Kidneys, Ureter, Bladder and Urethra • To learn the difference between URETER and URETHRA

  19. Exit • What are the tubes that carry urine from the kidneys to the bladder called? • The __________ is the tube that carries urine out of the body. • What is the job of the kidneys?

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