Muscle Mania: Crossword Challenge!

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Across
  1. 2. Muscles found in the intestines and blood vessels, working automatically
  2. 3. The muscle on the back of your upper arm, opposite the biceps
  3. 4. This muscle type keeps your heart beating and is involuntary
  4. 5. Quick muscle movements that happen without thinking, like pulling away from something hot
  5. 6. Muscles that work without you thinking, like your heart
  6. 8. The muscle in the upper arm that helps you lift things
  7. 9. These connect muscles to bones
Down
  1. 1. The largest muscle in your body, found in the buttocks
  2. 2. The appearance of skeletal muscles under a microscope
  3. 7. These muscles are attached to bones and help you move