Human body systems

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Across
  1. 2. Organs in the chest that allow for breathing and gas exchange
  2. 3. Muscular sac that breaks down food in the digestive system
  3. 6. System responsible for creating new life
  4. 8. System that regulates hormones and body functions
  5. 9. Proteins produced by the immune system to fight infections
  6. 11. System that provides structure and support for the body
  7. 13. Hard tissues that make up the skeletal system
  8. 14. System that allows for movement and flexibility
  9. 16. Structures made up of tissues that perform specific functions in the body
  10. 17. Largest organ in the body, part of the integumentary system
  11. 18. Tissues that contract and relax to allow for movement
  12. 19. Chemical messengers released by the endocrine system
Down
  1. 1. System responsible for breathing and gas exchange
  2. 4. System that transports blood throughout the body
  3. 5. System that controls and coordinates body functions
  4. 7. System that includes the skin, hair, and nails
  5. 10. System that breaks down food for energy and nutrients
  6. 12. Muscular organ that pumps blood through the circulatory system
  7. 13. Organ that controls thoughts, memories, and body functions
  8. 15. System that defends the body against infections and diseases