By: Lauren Turner

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By Lauren Turner
Excretory system
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Parts of System

• 1. Ureter Transports nitrogenous waste from the
  kidneys to urinary bladder.
• 2. Bladder Where urine is stored.
• 3. Kidney Regulates amount of water lost from
  the body.
• 4. Urethra Tube that carries urine from the
  bladder and out.

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Nephron

• Nephron Removes waste material, water, and
  harmful substances from the body.

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How urine is formed

• Urine is formed by first filtering the blood of
  its small molecules ions.
• Then, reclaiming the needed amounts of useful
  materials.
• Finally, the surplus or waste molecules ions
  that are left to flow out as urine.

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What is Kidney Dialysis?

• Kidney Dialysis is used to take impurities from
  the blood when the kidneys are not working
  properly.
• How does it work? Its a method for removing
  waste such as urea from the blood when the
  kidneys are incapable of this i.e. inronal
  failure.

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Vocabulary

• Renal Veins- Short thick veins which return blood
  from the kidneys to the vena cava.
• Urea- An end product of protein that is
  decomposition is synthesized from carbon dioxide.
• Urine- Waste material that is secreted by the
  kidneys in vertebrates.
• Nephron- A single excretory unit of the
  vertebrates kidney
• Glomerlus- Main filter of nephron and is located
  within Bowmans capsule.
• Bowmans Capsule- contains primary filtering
  device of the nephron blood is transported here.
• Proximal tubule-first region of nephron,
  reabsorption happens here of specific componets
  from the filtrate back to blood.
• Distal tubule-partially responsible for the
  regulation of potassium, sodium, calcium.
• Homeostasis- ability or tendency of an organism
  or cell to maintain internal equilibrium by
  adjusting its physiological process.