Human Body Organs and Systems

123456789101112
Across
  1. 2. This organ's job is to protect the body from the outside world.
  2. 5. This system contains the heart and blood vessels that work to circulate blood throughout the body.
  3. 6. This organ brings oxygen into the body and removes carbon dioxide.
  4. 8. This is the second largest organ in the human body.
  5. 9. This organ can be about 6 meters long when it is stretched out.
  6. 10. This system works with the circulatory system to circulate blood and oxygen throughout the body.
  7. 12. This system consists of nerves, the brain, and the spinal cord.
Down
  1. 1. This system contains both voluntary and involuntary muscles.
  2. 3. The key organ to the circulatory system.
  3. 4. The _______ system contains the skin, hair, nails, glands, and nerves.
  4. 7. This system breaks down the food you eat.
  5. 11. The _______ system supports the body and protects all of the major organs inside of it.