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8th Grade Ch  4 Sec  3 Excretory System
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8th Grade Ch 4 Sec 3 Excretory System

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  • 1. Ch. 4 Sec. 3 Excretory System
  • 2. The Excretory System Removes solid liquid & wastes
  • 3. kidneys major organs of excretion eliminate urea, excess water, & other wastes
  • 4.
    • To locate your kidneys, put your hands on your hips, then slide your hands up until you can feel your ribs.
    • Now if you put your thumbs on your back, you will know where your kidneys are.
    • You can't feel them, but they are there.
  • 5. bladder
    • muscular bag that holds urine
  • 6.
    • tube that carries urine from kidney  bladder
    • tube thru. which urine passes out of body
    ureter urethra
  • 7.  
  • 8. Kidneys are essential to our well-being. Though they are small – about the size of a clenched fist – people can’t survive very long without them.
  • 9.
    • Normally, people have two kidneys, located just under the ribs in the middle of the back.
    • About 10 centimeters long and shaped like kidney beans, they are often called the body’s “master chemists” because of all the functions they perform.
  • 10.  
  • 11. urea = chemical that comes from breakdown of proteins - formed in liver A chemical analysis can be useful in detecting medical problems. Normally, urine contains almost no glucose or protein.
  • 12. nephrons
    • Tiny, filtering factories found in kidneys
    • Remove wastes from blood & produces urine
  • 13. urinary system
  • 14. bladder kidney ureter urethra bladder - a hollow organ that stores urine until it is excreted. kidney – 2 bean-shaped organs that take waste from the blood & produce urine. ureter - 2 tubes, each of which carries urine from a kidney to the bladder. urethra - the tube that carries urine from the bladder out of the body.