metals on living environment

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Across
  1. 4. metals slowly build up in living things
  2. 8. that helps control nerves and body fluids
  3. 9. that helps make red blood cells
  4. 10. that helps body cells work properly
Down
  1. 1. that makes bones and teeth strong
  2. 2. that helps muscles and heart work
  3. 3. in blood that helps carry oxygen
  4. 5. metal that builds up in fish and animals
  5. 6. metal that can damage the brain and body
  6. 7. that helps the body fight sickness and heal