Human body

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Across
  1. 2. smallest unit of life
  2. 6. process by which food is broken down and absorbed by the body
  3. 9. system responsible for detecting and responding to stimuli
  4. 10. system responsible for oxygen exchange in the body
Down
  1. 1. part of the respiratory system that branches into the lungs
  2. 2. hard outer layer of bones
  3. 3. largest organ in the body
  4. 4. part of the brain responsible for consciousness and thought
  5. 5. part of the nervous system responsible for voluntary movement
  6. 7. main organ of the circulatory system
  7. 8. muscle that pumps blood throughout the body