Cells

• Cell


  Smallest unit of life of living organisms
• Cells are so small that we cannot see them with our naked eyes
• Cells


  • Have an outer coating and a water-based interior where organelles are found
  • Are alive
  • Have functions including nutrition, transformation of substances into energy, structural changes, growth in mitosis, and ability to control their own process of growth and division
• Types of organisms based on number of cells

  • Unicellular
  • Multicellular
• Unicellular organisms


  Very small and consist of one cell only
• Unicellular organisms


  • Bacteria
• Multicellular organisms


  Made up by a large number of cells
• Multicellular organisms


  • Trees
  • Animals
  • Human beings
• Prokaryotic cells


  • DNA, the genetic material, is floating in the cytoplasm instead of being stored in the nucleus
• Prokaryotic cells


  • Bacteria
• Eukaryotic cells


  • Nucleus is protected by a membrane
  • DNA is found inside
  • Contain genetic material and organelles in the cytoplasm
• Types of eukaryotic cells

  • Plant cells
  • Animal cells
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