Biology

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Across
  1. 3. Measure of heat energy in food
  2. 4. Chemical substance that an organism needs to sustain life
  3. 5. Step in which the body eliminates what it does not need
  4. 10. Response that blocks further actions of a stimulus
  5. 13. Type of tissue that lines the interior and exterior body surfces
  6. 16. Organic molecules that the body needs in very small amounts
  7. 18. Contractions of smooth muscles that provide the force that moves food through the esophagus toward the stomach
  8. 19. Bile is stored in it
  9. 20. It connects the mouth to the stomach
  10. 23. Process by which enzymes break down food into small molecules that the body can use
  11. 27. Nutrients are absorbed throughout its walls
  12. 28. Group of organs that perform closely related functions
  13. 30. Enzyme that breaks down proteins into smaller polypeptide fragments
  14. 31. Found in saliva, it breaks the chemical bonds in starches
Down
  1. 1. Protein catalyst that speeds up the rate of specific biological reactions
  2. 2. Group of similar cells that perform a particular function
  3. 3. It provides support for the body and connects its parts
  4. 6. Physical breakdown of large pieces of food
  5. 7. Made up of fatty acids and glycerol
  6. 8. Fingerlike projection in the small intestine
  7. 9. Constant internalphysical and chemical conditions that organisms maintain
  8. 11. First step in digestion
  9. 12. Basic unit of all forms of life
  10. 14. Large muscular sac that continues the mechanical and chemical digestion of food
  11. 15. Type of tissue that transmit nerve impulses throughout the body
  12. 17. Type of nutrient that is major source of energy for the body
  13. 21. Group of tissues that work together to perform closely related functions
  14. 22. Fluis loaded with lipids and salts
  15. 24. Movements of the body are possible because o it
  16. 25. Compound with an amino group on one end and a carboxyl group on the other end
  17. 26. Converts food into small molecules
  18. 29. Inorganic nutrient the body needs