The Excretory System

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The Excretory System

• Urine for a Great Time!!!

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Primary Urinary Organs

• 2 Kidneys
• Renal cortex (outer region)
• Renal medulla (inner region)
• Nephron functional unit of kidney
• Renal artery/vein kidney blood flow
• 2- Ureters urine excretory duct
• 1 - Urinary bladder urine storage
• 1 - Urethra urine elimination tube

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Kidneys

• Two reddish organs just above the waist behind
  the stomach
• Filter the blood and removes waste

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Ureter

• Connects the kidneys to the urinary bladder

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Urinary Bladder

• Smooth muscle bag
• Stores waste solution - urine

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Urethra

• Connects bladder to outside of the body
• Allows urine to pass out of the body

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Nephron

• Filtering unit of the kidney
• Blood enters full of waste and leaves filtered
• Blood enters under high pressure and flows into
  the capillary beds

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U-shaped Tubules (Loop of Henle)

• Most of the ions and water
• All of the glucose and amino acids
• Reabsorbed into the bloodstream
• This is how the bodys water is conserved
• Homeostasis is maintained

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The Human Kidney Nephron
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Excretory System

• Contributing Excretory Organs
• Liver
• removes hazardous chemicals from the blood.
• "detoxifies" the blood
• For this reason, alcoholics and other types of
  addicts have a higher incidence of liver disease.
  
• Some proteins other nitrogenous compounds are
  broken down in the liver forming a compound call
  urea
• Lungs
• excrete waste like carbon dioxide and water.
• Skin
• rids waste from the body through sweat glands
• Kidneys

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