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Excretory System

Explore the importance of the excretory system in maintaining homeostasis by filtering out harmful materials, excess fluids, chemicals, and more. Learn about the organs involved, like the kidneys, ureters, bladder, and urethra, and their functions in removing waste from the body. Discover how urine is produced and stored until elimination, and the role of other excretory organs such as the skin, lungs, and large intestine. Test your knowledge on the functions of the excretory system and its vital contribution to overall health.

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Excretory System

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  1. Excretory System

  2. Excretory System • Why do we 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

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

  4. 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)

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

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

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

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

  9. Functions of Excretory System • Filters & removes cell wastes from the blood

  10. Functions of Excretory System • Filters & removes cell wastes from the blood • Controls blood volume by removing extra water produced by cells

  11. Functions of Excretory System • Filters & removes cell wastes from the blood • Controls blood volume by removing extra water produced by cells • Balances salts and water so cells can function properly

  12. 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

  13. Other Excretory Organs • Skin = releases perspiration (water and salts) to remove excess heat (cool off) • Lungs = release carbon dioxide from the body • Large Intestine = release undigested food from the body

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

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