Topic 1: Cells as the basis of life

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Across
  1. 2. Movement of molecules from high concentration to low concentration.
  2. 3. Selectively permeable barrier controlling movement of substances in and out of cells.
  3. 6. Structure composed of multiple tissues working together.
  4. 8. Stem cells able to develop into almost any cell type in the body.
  5. 10. Main component of cell membranes forming a bilayer structure.
  6. 11. Stem cells that can produce a limited range of related cell types.
  7. 13. Process where stem cells develop into specialised cell types.
  8. 15. Group of similar specialised cells performing a specific function.
  9. 16. Group of organs working together to perform a major body function.
  10. 17. Undifferentiated cells capable of dividing and developing into specialised cells.
  11. 18. Movement of substances across membranes using energy.
Down
  1. 1. Movement of substances across membranes without energy input.
  2. 4. Cell type containing a nucleus and membrane-bound organelles.
  3. 5. Cell division process producing two genetically identical daughter cells.
  4. 6. Diffusion of water across a selectively permeable membrane.
  5. 7. Stem cells able to form any cell type including embryonic and extraembryonic tissues.
  6. 9. Process where a cell engulfs materials by forming a vesicle.
  7. 12. Stem cells that can produce only one specific cell type.
  8. 14. Cell type lacking a nucleus and membrane-bound organelles.
  9. 17. Relationship between surface area and volume that limits cell size and exchange efficiency.