Body systems.

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Across
  1. 1. This system has muscles.
  2. 3. This system helps you to be protected from bad jerks and viruses.
  3. 4. This system controls everything that happens in your body.
  4. 5. This system has veins.
Down
  1. 2. This system helps you to not look like a jelly and protects organs that are inside of you.
  2. 6. This system is least important.