Biology Crossword

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Across
  1. 3. upper chamber of the heart that receives blood
  2. 4. substance obtained from food used for energy growth or repair
  3. 5. total of all chemical reactions occurring in an organism
  4. 10. system group of organs working together to perform major body functions
  5. 12. shortening of a muscle that produces force
  6. 15. maintenance of stable internal conditions in a living organism
  7. 16. airway that carries air from the throat to the lungs
  8. 18. system body system responsible for movement posture and heat production
  9. 21. process of exchanging oxygen and carbon dioxide in the body
  10. 23. group of similar cells working together to perform a function
  11. 24. circulation movement of blood between heart and the rest of the body
  12. 27. circulation movement of blood between heart and lungs
  13. 29. rigid connective tissue that forms the skeleton
  14. 32. lower chamber of the heart that pumps blood out of the heart
  15. 35. muscle that contracts to expand the lungs during inhalation
  16. 36. blood vessel that carries blood toward the heart
  17. 37. system framework of bones that supports and protects the body
Down
  1. 1. location where two or more bones meet
  2. 2. mechanical and chemical breakdown of food into absorbable molecules
  3. 3. tiny air sac in the lungs where gas exchange occurs
  4. 6. muscle involuntary muscle found in organs and blood vessels
  5. 7. wave like muscular contractions that move food through the digestive tract
  6. 8. large airway that branches from the trachea into the lungs
  7. 9. flexible connective tissue that cushions joints
  8. 11. tissue specialized tissue that contracts to produce movement
  9. 12. microscopic vessel where gas nutrient and waste exchange occurs
  10. 13. connective tissue that attaches muscle to bone
  11. 14. soft tissue inside bones where blood cells are produced
  12. 17. straightening movement that increases the angle of a joint
  13. 19. blood vessel that carries blood away from the heart
  14. 20. connective tissue that connects bone to bone
  15. 22. movement of digested nutrients into the bloodstream
  16. 25. bending movement that decreases the angle of a joint
  17. 26. muscle specialized muscle tissue found only in the heart
  18. 28. muscle voluntary muscle attached to bones that moves the skeleton
  19. 30. biological catalyst that speeds up chemical reactions in cells
  20. 31. structure made of multiple tissues performing a specific function
  21. 32. structure that prevents backflow of blood in the heart
  22. 33. system that transports blood nutrients gases and wastes throughout the body
  23. 34. protein in red blood cells that binds oxygen