Discovery of Cells and Cell Theory

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Across
  1. 3. a specialized tissue in a body that controls the heart.
  2. 5. The basic unit of life.
  3. 7. In 1665, this scientist discovered cells by observing thin slices of cork under a microscope.
  4. 8. A type of cell that has a nucleus and many membrane-bound structures. (Examples: plant, animal, and fungi cells)
  5. 10. Tissues come together to form these structures, which carry out important functions for the body. (Examples: heart, stomach, and skin)
  6. 13. This organelle is a sac that stores water, food, and/or waste products.
  7. 14. This rigid outer covering is found only in plant cells. It gives the plant cell structure and support.
  8. 15. a specialized tissue in a body helps with movement.
  9. 17. A jelly-like substance that fills the cell and contains all of the organelles.
  10. 18. This organelle forms the cells boundary (its outer covering).
Down
  1. 1. a specialized tissue in the body that transports messages from the brain to locations throughout the body.
  2. 2. This organelle provides energy for the cell.
  3. 4. A type of cell that does not have a nucleus or other membrane-bound structures. (Example: Bacteria)
  4. 6. Robert Hooke, Theodor Schwann, Matthias Schleiden, Rudolph Virchow all made discoveries, which contributed to the development of this fundamental principle of biology.
  5. 9. Cells that work together for a common function form __________.
  6. 10. Parts of a cell that carry out important functions for the cell.
  7. 11. This organelle contains DNA and directs the cell’s activity
  8. 12. This scientific tool magnifies small objects, making it possible to observe cells.
  9. 16. This green, disc-shaped organelle is found only in plant cells. Photosynthesis takes place within this organelle.