Biology

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Across
  1. 2. exchange the process of taking in oxygen and releasing carbon dioxide.
  2. 3. differentiation the series of events through which stem cells develop into specialized cells
  3. 4. tiny blood vessels that play an important role in gas exchange
  4. 5. the stage in the cell cycle when the cytoplasm and organelles divide into to identical, separate cells.
  5. 8. the stage in the cell cycle when the contents of the nucleus separate into two identical copies.
  6. 12. the ability to grow new cells to replace damaged or lost body components.
  7. 15. the fourth phase of mitosis, when the membrane surrounding the nucleus re-forms, creating two new nuclei
  8. 16. air sacs in the lungs where gas exchange occurs
  9. 17. blood cells blood cells that carry oxygen and carbon dioxide in the blood.
  10. 18. the third phase in mitosis, when the chromosomes separate and move to opposite ends of the cell
  11. 20. the movement of molecules or other particles from an area of high concentration to an area of low concentration until they are evenly distributed.
  12. 22. cycle the continuous series of events in the life of a cell in which it is born, grows, reproduces, and dies
Down
  1. 1. a structure within a cell that carries out specific functions to support the life of the cell.
  2. 4. the number of molecules of a substance in a given volume
  3. 6. the movement of water molecules across a membrane in response to concentration differences
  4. 7. the first phase in mitosis, when the nucleus and nuclear membrane disappear and chromosomes form
  5. 9. imaging technology technologies that are used to make images of cells, tissues, and organs
  6. 10. the second phase of mitosis, when the chromosomes align in the center of the cell.
  7. 11. different tissues working together to perform a specific task.
  8. 13. the process by which nutrients diffuse or are moved from the digestive system to the blood.
  9. 14. the stage in the cell cycle when a cell grows and carries out its usual functions, as well as making a copy of its DNA and organelles to prepare for cell division
  10. 19. specialized cells working together to perform a function
  11. 21. system a small group of organs that interact with each other to perform a common task