Humans

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Across
  1. 3. What makes 60-70 percent human body weight?
  2. 4. What is the human body's biggest organ?
  3. 5. Which organ is responsible for regulating the blood sugar level?
  4. 9. These body parts get smaller when you exhale air
  5. 10. This is your body's master chemical that controls characteristics, eye color, etc.
  6. 13. Joint at the top of the arm
  7. 14. When does a person show rapid eye movement (REM)?
  8. 15. What is the name of the substance that gives skin and hair its pigment?
Down
  1. 1. You use these when you walk.
  2. 2. What system in the human body helps blood circulation
  3. 6. The two holes in your nose are called ___.
  4. 7. Your muscles are _______ your skin
  5. 8. Joint between the leg and foot
  6. 11. What protects your brain?
  7. 12. Which organ makes urine?
  8. 14. This is the hardest part of your body.