LS9 U2 PT Part1

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Across
  1. 1. the act of respiring.
  2. 4. digesting food.
  3. 5. relating to the circulation of blood.
  4. 7. the immune system's way of protecting the body against an infectious disease.
  5. 9. a body tissue consisting of long cells that can contract and produce motion
  6. 11. relating to or functioning as a skeleton.
  7. 12. the process by which organisms expels metabolic waste products and other toxic substances from their body.
Down
  1. 2. forming a tough, protective layer.
  2. 3. To produce egg and sperm cells.
  3. 6. easily agitated or alarmed; tending to be anxious; highly strung.
  4. 8. a complex network of glands and organs.
  5. 10. the fluid that flows through the lymphatic system.