Human Body Crossword

123456789
Across
  1. 4. fundamental unit of a gene, located in the nucleus of cells of living organisms
  2. 5. system brings air into the body + removes carbon dioxide
  3. 7. system skeletal muscles, smooth muscles, cardiac muscles
  4. 8. breaks down food (system)
  5. 9. central part of most cells that contains genetic material and is enclosed in a membrane
Down
  1. 1. tough tissues attached to bones, contract + relax for movement
  2. 2. system that protects major internal organs and provides overall support
  3. 3. nervous system organ that controls all actions
  4. 4. system esophagus, stomach, intestines
  5. 6. sense organ used for sound detection