Unicellular and pluricellular living things
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  • 1. LIVING BEINGS
  • 2. All living beings are made up of cells
  • 3. Life started long time ago...
    • Every single living being
    • evolved from simpler
    • structures of cells than
    • they are now.
  • 4. Unicellular living beings Their bodies are made up of one cell,like virus and bacterium
  • 5. Cells organized in groups becoming into a new structure.
  • 6. What are CELLS?
    • Cells are the tiny building blocks of living things.
    • All cells, whether plant or animal have the same basic parts : cell membrane, cytoplasm, nucleus,nuclear membrane,vacuoles and mitochondria.
    • Each part performs a specific function.
    • A cell is able to reproduce by means of splitting. Previously the nucleus doubles and divides in half so each new cell has a copy of the cell´s instructions
  • 7. ANIMAL CELL
  • 8. How do cells work?
    • They use their parts to perform different jobs.
    • Cell membrane separates it, gives the cell its shape and control what goes into and out of it.
    • Cytoplasm is a jellylike liquid. It is inside the cell membrane.
    • Vacuoles are tiny oval structures that store food, water or wastes. They are inside the cytoplasm.
    • Mitochondria helps to change food into the necessary energy to do the cell work. It is inside the cytoplasm too.
    • Nucleus contains the instructions for running the cell. It is surrounded by the nuclear membrane whose function is similar to cell membrane.
  • 9. PLANT CELL
  • 10. PLANT CELLS HOWEVER...
    • ... have two additional parts that animal cells do not.
    • Plant cells have cell walls around the cell membrane to support and protect the cell.
    • Plant cells also contain chloroplasts with a green substance called chlorophyll.
    • Chlorophyll traps energy from sunlight and enables the plant to make its own food.
  • 11. Cells form tissues
  • 12. CELLS ARE DIFFERENT
    • Cells do not all look the same. Their shape depends on the job they do.
    • A group of cells which carry out a specific task form a tissue.
    • All tissues that make a common function form an organ .
  • 13. Tissues, organs and systems There are several systems in the bodies of living beings that are organized and specialized to do specific tasks . All systems have to work at the same time in a coordinated process.