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The Excretory System

The Excretory System. HB&H Chapter 5.3 Pages 145-150. What a Waste. Your cells use up nutrients from food ( protein, carbs , vitamins ) and create waste The Excretory System collects and removes waste from the body Like trash collectors Process of removing waste is called Excretion .

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The Excretory System

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  1. The Excretory System HB&H Chapter 5.3 Pages 145-150

  2. What a Waste • Your cells use up nutrients from food (protein, carbs, vitamins) and create waste • The Excretory System collects and removes waste from the body • Like trash collectors • Process of removing waste is called Excretion.

  3. Your Wha? • To leave the body, urine follows this path… • Kidneys • Ureters – tubes leading out of the kidneys • Urinary Bladder – pouch that stores urine • Urethra – tube that leads out of the body • Urea and other waste is removed from the body in the form of Urine: mixture of water and urea.

  4. Organs of Importance • The major organs of the Excretory System are your two Kidneys • Kidneys filter out waste called Urea, a chemical made from broken down proteins.

  5. Filtration Station • Your kidneys filter 180 liters of fluid each day • Only about 2 liters are converted into Urine • The kidney contains hundreds of thousands of filters called Nephrons: structures that remove waste from blood.

  6. Water Weight • Up to 60% of your body is water • You need to take in 2 liters of water a day • Kidneys help maintain water levels to keep you in Homeostasis (stable internal environment).

  7. Ur-ineTrouble! • Urine can be tested to check for illness • Glucose (a simple carb) in the urine indicates risk of Diabetes • Protein in urine can indicate problems with your kidneys • Urine is also a good indicator of your hydration levels.

  8. Exit Pass What are 2 of the 4 parts of the Excretory System?

  9. What to Work On • Read Section 5.3 in your textbook (pages 145-150) • Answer the section review questions (#’s 1-4) on page 150 DUE: Friday, April 27th

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