Cells And Body Systems

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Across
  1. 2. purpose or task
  2. 3. two main branches of the trachea that lead into the lungs (singular bronchus)
  3. 7. tubes that connect the bronchi to the air sacs in the lungs
  4. 11. the production of offspring by a sexual or asexual process
  5. 12. an optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times
  6. 14. tiny blood vessels that connect arteries to veins; one cell layer thick and extremely narrow
  7. 16. group of tissues that work together to perform a specific function
  8. 18. made of just one cell
  9. 19. type of microscopic organisms
  10. 20. breaks down the food you eat into parts small enough to be absorbed and transported throughout the body
  11. 21. the basic unit of life
  12. 22. transport system reaching every cell in the body; delivers nutrients absorbed by the digestive system and oxygen absorbed by the respiratory system to every cell; transports waste products from cells for removal by the excretory system; defends the body against disease; connects all organ systems
  13. 24. removes chemical and gaseous wastes from the body; involves organs from other bodily systems
  14. 25. group of similar cells working together to perform a specific function
Down
  1. 1. the movement of particles of a substance from an area of higher concentration to an area of lower concentration
  2. 4. diffusion of water through a selectively permeable membrane
  3. 5. usually unicellular organisms that can be seen only through a microscope
  4. 6. the strength and vitality required for sustained physical or mental activity
  5. 8. hair-like extensions that protrude from the surface of some unicellular organisms and from some cells in multicellular organisms
  6. 9. a change or the process of change by which an organism or species becomes better suited to its environment
  7. 10. coordinates and controls all organs and organ systems; detects, processes, and responds to stimuli
  8. 13. living things
  9. 15. made of more than one cell
  10. 17. supplies blood with oxygen from the outside air and removes carbon dioxide from your blood
  11. 23. parts of an organism that perform specific tasks