Biology Revision

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Across
  1. 3. Anything that causes our body to stop working properly
  2. 4. The type of blood cell that assists our immune system
  3. 8. A viral disease that causes a rash of itchy blisters
  4. 11. The brain and spinal cord are a part of what type of nervous system
  5. 12. The branches that come out of cell body of a nerve cell that receive messages from other nerve cells
  6. 14. The type of system in your body that fights infections
Down
  1. 1. A chemical that helps break down or build up molecules
  2. 2. An organism that causes disease
  3. 5. Glands that produce hormones belong to which body system
  4. 6. Microscopic, single-celled organisms
  5. 7. A chemical substance, produced from glands, that helps send messages in the body
  6. 9. A disease that can spread is called what type of disease
  7. 10. The type of neuron that sends messages to muscles to make them contract
  8. 13. A pathogen that is about 100 times smaller than bacteria