Excretory System Crossword

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Across
  1. 3. the study of the function of living things
  2. 4. for the production of sweat
  3. 6. the study of the structure of organisms
  4. 7. reddish-brown organ located below the diaphragm
  5. 8. bean-shaped organ for removing waste products by urine
Down
  1. 1. the balance within an organism; its stable condition
  2. 2. gaseous waste released from exhaling
  3. 5. bag-like organs for breathing