Across
- 1. Membrane, Outer membrane, covers a cell's surface
- 2. Schleiden, in 1838, discovered plant cells
- 5. has a nucleus and membrane-bound organelles
- 6. Schwann, in 1839, discovered animal cells
- 7. Theory, All living things, basic units of structure, come from pre-existing cells
- 8. Envelope, a double membrane that surrounds the nucleus
- 10. Mosaic Model, states that the phospholipid behaves like a fluid than a solid
- 13. a region that includes the fluid, the cytoskeleton
- 14. van Leeuwenhoek, in 1673 first to observe living cells (microorganisms)
- 17. inner membrane
- 18. area-to-volume ratio, limited size, need to have cells get in and out
- 19. directs the cell's activities and stores the DNA and chromatin
- 20. Virchow, 855, determined cells from preexisting cells
Down
- 1. lacks a nucleus and membrane-bound organelles
- 2. known as the powerhouse of the cell
- 3. makes ribosomes and RNA
- 4. specialized structures within a cell
- 7. is the DNA
- 9. ER, builds lipids, helps with detoxification
- 11. the smallest unit that can carry out all the processes of life
- 12. the only fluid part of the cell
- 15. fluid on the inside
- 16. Hooke,665, discovered cells in slices of cork