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Excretory System

Excretory System. Vocabulary. Kidneys Nephrons Glomerulus (Capillary bed) Urine Urea Ureter Urethra Bladder. Excretory System. Why do our bodies need to filter waste from the body? Maintain homeostasis Removal of harmful materials

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Excretory System

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  1. Excretory System

  2. Vocabulary • Kidneys • Nephrons • Glomerulus (Capillary bed) • Urine • Urea • Ureter • Urethra • Bladder

  3. Excretory System • Why do our bodies need to filter waste from the body? • Maintain homeostasis • Removal of harmful materials • Removal of excess fluids, chemicals, minerals, vitamins, salts, and other wastes from the blood

  4. Organs of the Excretory System • Kidneys = filter blood that has collected wastes from cells

  5. Organs of the Excretory System • Kidneys = filter blood that has collected wastes from cells – Nephrons = filters inside the kidneys – Produce urine (sterile waste fluid, 96% water)

  6. Organs of the Excretory System • Ureters = tubes that lead from each kidney to bladder

  7. Organs of the Excretory System • Urinary bladder = muscular organ that holds urine

  8. Organs of the Excretory System • Urethra = tube that carries urine from the bladder out of the body

  9. Where is urine stored until the body is ready to eliminate it? • Kidneys • Ureters • Bladder • Urethra

  10. Functions of Excretory System • Rids blood of wastes (urea)

  11. Functions of Excretory System • Rids blood of wastes (urea) • Controls blood volume by removing extra water produced by cells

  12. Functions of Excretory System • Rids blood of wastes (urea) • Controls blood volume by removing extra water produced by cells • Balances salts and water so cells can function properly

  13. Which is not a function of the excretory system? • Removes wastes from the blood • Removes excess water from the blood • Removes carbon dioxide from the blood • Removes excess salt from the blood

  14. Other Excretory Organs • Skin = releases perspiration (water and salts) to cool off the body

  15. Other Excretory Organs • Lungs = release carbon dioxide from the body

  16. Which system does not include an excretory organ? • Excretory system • Integumentary system • Cardiovascular system • Respiratory system

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