The excretory system

• What is the first step in blood circulation through the kidneys?

  Blood is brought to the kidney through the renal artery
• What do the kidneys regulate and remove?

  The kidneys regulate water and salt content
• What forms when excess water, salts, and urea are filtered by the kidneys?

  They form a liquid called urine
• How is urine transported from the kidneys?

  Urine is transported to the bladder through ureters
• What is the function of the bladder in the excretory system?

  The bladder stores urine until it is expelled
• How does purified blood return to the body after filtration by the kidneys?

  Purified blood returns through the renal vein
• What is the pathway of blood circulation through the kidneys?

  1. Blood enters through the renal artery
  2. Kidneys regulate water, salt, and remove urea
  3. Excess substances form urine
  4. Urine travels to the bladder via ureters
  5. Bladder stores urine until expulsion
  6. Purified blood returns through the renal vein