Across
- 2. This organ's job is to protect the body from the outside world.
- 5. This system contains the heart and blood vessels that work to circulate blood throughout the body.
- 6. This organ brings oxygen into the body and removes carbon dioxide.
- 8. This is the second largest organ in the human body.
- 9. This organ can be about 6 meters long when it is stretched out.
- 10. This system works with the circulatory system to circulate blood and oxygen throughout the body.
- 12. This system consists of nerves, the brain, and the spinal cord.
Down
- 1. This system contains both voluntary and involuntary muscles.
- 3. The key organ to the circulatory system.
- 4. The _______ system contains the skin, hair, nails, glands, and nerves.
- 7. This system breaks down the food you eat.
- 11. The _______ system supports the body and protects all of the major organs inside of it.