Biology Crossword

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Across
  1. 3. muscle at the floor of the mouth that mixes food with saliva and pushes it back to the mouth to be swallowed
  2. 4. cells that engulf and destroy bacteria and debris
  3. 7. muscular rings that can contract to block the passage of materials
  4. 10. eating disorder; a person eats large quantities of food and then intentionally vomits it out
  5. 12. eating disorder; self-imposed starvation and refusal to maintain normal body weight
  6. 14. antimicrobial molecules that communicate with immune system cells and stimulate the development of a fever
  7. 15. triggers the production of antibodies, which bind mast cells
  8. 16. fluid component of blood that transports cells, platelets, and numerous types of dissolved chemicals
  9. 18. herbivore with a complex, four-chambered organ that specializes in the digestion of grass
  10. 21. cell fragments that collect near a wound
  11. 22. absence of one or more essential elements of the immune system
  12. 24. biochemical that causes blood vessels to dilate
  13. 26. blood pressure that reflects the force exerted on artery walls when the ventricles contract
  14. 28. the outermost layer, and it consists partly of dry, dead cells that help keep invaders outside the body
  15. 29. measure the energy stored in food
  16. 30. forms the external entrance to the nasal cavity, functions in breathing, immunity, and the sense of smell
Down
  1. 1. immune reaction to a harmless substance
  2. 2. tube that connects the bladder with the outside of the body
  3. 5. fatty deposits inside the walls of arteries reduce blood flow to the brain, heart, limbs or kidneys
  4. 6. enzyme that digests proteins
  5. 8. windpipe; tube just beneath the larynx
  6. 9. muscular bag that receives food from the esophagus
  7. 11. an immediate, localized reaction to an injury or to any pathogen that breaches the body’s barriers
  8. 13. rhythmic waves of contraction that propel food in one direction
  9. 17. inflammation of the alveoli, usually resulting from an infection with bacteria, viruses, or fungi
  10. 19. white blood cells that participate in inflammation
  11. 20. a type of cancer in which red bone marrow produces too many white blood cells
  12. 23. blood pressure when the ventricles relax
  13. 25. a Y-shaped protein composed of two heavy and two light polypeptide chains
  14. 27. blood vessels that carry blood away from the heart