Biology Crossword Puzzle

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Across
  1. 5. Microscopic filtering units from which kidneys are composed
  2. 7. Spot from where paramoecium ingests its food
  3. 8. Opening from which gaseous exchange takes place
  4. 9. Type of anaerobic respiration that takes place in human muscles
  5. 11. Muscular partition which seperates chest cavity from abdominal cavity
Down
  1. 1. Pigment due to which blood is red in colour
  2. 2. Opening through which urine passes out
  3. 3. Enzymes which alter the rate of biochemical reactions
  4. 4. Mode of nutrition in amoeba
  5. 6. Organ that produces bile juice
  6. 10. Long muscular tube which connects the mouth to the stomach