Across
- 2. part of the digestive and endocrine systems
- 4. outer layer of the skin
- 7. carries blood toward the heart
- 10. protect the body from pathogens
- 11. type of muscle found in organs
- 12. type of muscle that attaches to the bones and moves them
- 13. carries blood away from the heart
- 14. a place where two bones meet
Down
- 1. the first line of defense for the body
- 3. type of muscle found in the heart
- 5. absorbs most of the food that passes through the body
- 6. tiny air sacs in the lungs
- 8. part of the urinary system and removes waste and excess fluid
- 9. the body's chemical messengers