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The Excretory System

The Excretory System. How Our Body Eliminates Cellular Wastes. Excretory System – removes excess water, H 2 O, urea, carbon dioxide, CO 2 , and other wastes from our blood. Kidneys – filter out excess water and urea Lungs – filter out carbon dioxide, CO 2 , from the blood.

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The Excretory System

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  1. The Excretory System How Our Body Eliminates Cellular Wastes

  2. Excretory System – removes excess water, H2O, urea, carbon dioxide, CO2, and other wastes from our blood. • Kidneys – filter out excess water and urea • Lungs – filter out carbon dioxide, CO2, from the blood. • Skin – excretes water, as sweat, which contains some trace chemical wastes, including urea.

  3. I. The Kidneys • Every drop of blood in your body is filtered by your kidneys more than 300 times per day! • Kidneys eliminate urea, minerals and excess water. • Kidneys regulate the amount of water we need to maintain in our bodies.

  4. Kidneys – filter wastes and excess water from the blood. Ureters – tubes that take urine from the kidney to the urinary bladder. Urinary Bladder – a sack that stores urine. Urethra – small tube that leads urine out of the body.

  5. II. 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.

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