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Lesson 5 – The Excretory System. Chapter 3 – Human Body Systems. What does the excretory system do?. It gets rid of wastes: solid waste from digestion (through the large intestine) carbon dioxide from cells (through the lungs). What does the excretory system do?.

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what does the excretory system do
What does the excretory system do?
  • It gets rid of wastes:
    • solid waste from digestion (through the large intestine)
    • carbon dioxide from cells (through the lungs)
what does the excretory system do1
What does the excretory system do?
  • It gets rid of wastes:
    • liquid waste from cells (through the kidneys, which filter wastes out of the blood and then produce urine)
    • sweat (through the skin)
how does your body filter blood
How does your body filter blood?
  • Blood passes through the kidneys 60 times a day.
  • The kidneys remove substances the body no longer needs and returns substances it does need.
  • Nephron – part of the kidney where wastes are separated from useful materials
what happens if the kidneys stop working
What happens if the kidneys stop working?
  • Wastes can build up to dangerous levels.
  • People with this problem need dialysis, a treatment where a machine does the job of the kidneys.
how does your body get rid of liquid wastes
How does your body get rid of liquid wastes?
  • Through the urinary system:
    • Urine is released from the body.
  • Through the skin:
    • Sweat is released through tiny openings in the skin calledpores.