BIOLOGY (Local)

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Across
  1. 3. thin-walled, inelastic blood vessels. That have valves that keep blood from backing up as it is carried towards the heart
  2. 5. a structure within a cell that carries out specific functions to support the life of the cell
  3. 6. enables body parts to move, exert force, or change shape
  4. 7. churns and digests food
  5. 10. the number of molecules of a substance in a given volume
  6. 13. pumps blood through the body
  7. 15. air sacs in the lungs where gas exchange occurs
  8. 16. controls all body activities
  9. 18. thick-walled, elastic blood vessels that carry blood away from the heart
Down
  1. 1. specialized cells working together to perform a function
  2. 2. cleans the blood, stores substances such as certain vitamins and minerals
  3. 4. Involves directing sound waves at a body part and measuring reflected sound waves to make an image
  4. 5. the movement of water molecules across a membrane in response to concentration differences
  5. 8. draw oxygen-rich air into the body and remove carbon-dioxide-rich air from the body
  6. 9. the movement of molecules from an area of high concentration to an area of low concentration until they are evenly distributed
  7. 10. the smallest blood vessel
  8. 11. the process by which nutrients pass from the digestive system to the blood
  9. 12. different tissues working together to perform a specific task
  10. 14. produce urine by filtering wastes and excess water from the blood
  11. 17. involves sending electromagnetic radiation through the body to make an image