Human Body Systems

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Across
  1. 3. pertaining to the act of breathing
  2. 4. animal tissue consisting predominantly of contractile cells
  3. 5. a group of independent elements comprising a unified whole
  4. 7. of or relating to a system of sensory apparatus
  5. 10. a substance that aids the process of breaking down food
  6. 11. of or pertaining to glands that secretes hormones
  7. 12. a structure in an animal specialized for some function
  8. 13. either of two saclike respiratory organs in the chest of vertebrates; serves to remove carbon dioxide and provide oxygen to the blood
  9. 14. of or relating to circulation
Down
  1. 1. of or relating to the process of excretion
  2. 2. rigid tissue that makes up the skeleton of vertebrates
  3. 5. a natural protective body covering and site of the sense of touch
  4. 6. relating to a structure made of bones and cartilage
  5. 8. the hollow muscular organ located behind the sternum
  6. 9. of or relating to the outer protective coating of organisms