Excretory system
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Excretory system Presentation Transcript

  • 1. Urinary/Excretory SystemBesides getting rid of wastes andfiltering toxins out of the blood, it also…..
  • 2. Urinary/Excretory System Works closely with the digestive, circulatory and nervous systems. As the heart pumps blood around the body, the blood carries fresh oxygen to various cells and organs, then picks up waste products like carbon dioxide, salt and urea. There is an artery and a vein that runs into and out of each kidney to take the blood there and back.
  • 3.  As the waste products arrive, the kidneys perform a filtration process that removes hazardous toxins and products that the body can not use from water and nutrients that can be reclaimed and recycled. The kidneys return the reclaimed water back to the body, but mix the waste products into a liquid waste compound known as urine.
  • 4.  The kidneys direct the urine to the bladder, where it is collected and held until it is either manually expelled or forced out by involuntary muscle contractions.
  • 5.  The excretory system takes advantage of sweating by providing waste liquids to accomplish the cooling effect. Sweat is not pure water; instead, it is a solution of approximately 94 percent water and six percent waste products. By excreting weak urine through the skins pores, the excretory system can perform the dual functions of ridding the body of waste products while also keeping it cool.
  • 6. Urinary/Excretory System Kidneys - Controls amount of water and salt in body with the following feedback loop:  If too low, retains water/salt and keeps them from going to the bladder  If too high, pushes more water and salt into the bladder
  • 7. Diseases/afflictions of the urinary/excretory system Diarrhea UTI infection Colon Cancer Constipation Kidney stone Flatulence incontinence
  • 8. Activity Data Lab: Urinalysis