Cells


         What is a cell?
      What’s inside a cell?
What are the differences between
  animal cells and plant cel...
What is a cell?
• A cell is the smallest unit that is capable of
  performing life functions.
• The cells theory states th...
Examples of Cells
             Amoeba Proteus


                              Plant Stem


Bacteria


                    ...
What is inside a cell?
• Cells are made up of       • Some organelles are
  parts called organelles      only found in pla...
Cell Membrane
                                                      • Surrounds a cell, allows
                           ...
Cell Wall
                                                      • Tough material
                                         ...
Nucleus
• Directs cell activities
• Separated from cytoplasm by nuclear
  membrane
• Contains genetic material - DNA
Cytoplasm
• All the material of the cell between the cell
  membrane and the nucleus
• Gel-like mixture
• Surrounded by ce...
Mitochondria
• The cell’s power
  producers.
• Mitochondria combine
  oxygen and food to
  produce energy in the
  process...
Vacuoles
• Membrane-bound
  sacs for storage,
  digestion, and waste
  removal
• Contains water
  solution
• Larger in pla...
Chloroplast
• Uses the energy in
  sunlight to turn water
  and carbon dioxide
  into sugar and oxygen
  (a process called...
What are the differences between
       plant and animal cells?
• Plant cells are much like animal cells, except for 3
  i...
Plant Cell vs Animal Cell
What am I, plant or animal?
Plant Cell   Animal Cell
Pictures of cells




              Cancer cell being attacked by
                  the immune system
Nerve
                     Cells




Cheek (Skin) Cells           Liver Cells
A plant cell
                          from the leaf
                            of a poplar
                             ...
Stomach Cells

Cardiac Muscle (Heart) Cells
                                       Muscle Cells



                       ...
Very thin slice of plant skin

                                        Orchid (flower) cells
    Leaf Cells of Moss


    ...
Credit Slide
• Pictures were found via yahoo image
  search.
• Some information was found via yahoo
  search.
• Some infor...
Cells
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Cells

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Cells

  1. 1. Cells What is a cell? What’s inside a cell? What are the differences between animal cells and plant cells.
  2. 2. What is a cell? • A cell is the smallest unit that is capable of performing life functions. • The cells theory states the following: – All living things are made up of cells. – All cells come from preexisting cells through cell division. Red Blood Cells Cheek (Skin) Cells Onion Cells
  3. 3. Examples of Cells Amoeba Proteus Plant Stem Bacteria Red Blood Cell Nerve Cell
  4. 4. What is inside a cell? • Cells are made up of • Some organelles are parts called organelles only found in plant cells. or “little organs”. – These include cell walls • The parts of a cell that and chloroplasts. we are going to discuss – The vacuoles found in include: plant cells are larger. – Cell Membrane – Cell Wall – Nucleus – Cytoplasm – Chloroplasts – Vacuoles – Mitochondria
  5. 5. Cell Membrane • Surrounds a cell, allows certain materials to enter the cell and waste products to exit • Outer membrane of cell that controls movement in and out of the cell • Double layer http://library.thinkquest.org/12413/structures.html
  6. 6. Cell Wall • Tough material surrounding the cell membrane in plant cells. • Most commonly found in plant cells & bacteria • Supports & protects cells http://library.thinkquest.org/12413/structures.html
  7. 7. Nucleus • Directs cell activities • Separated from cytoplasm by nuclear membrane • Contains genetic material - DNA
  8. 8. Cytoplasm • All the material of the cell between the cell membrane and the nucleus • Gel-like mixture • Surrounded by cell membrane • Contains hereditary material
  9. 9. Mitochondria • The cell’s power producers. • Mitochondria combine oxygen and food to produce energy in the process of cellular respiration. • Controls level of water and other materials in cell http://library.thinkquest.org/12413/structures.html
  10. 10. Vacuoles • Membrane-bound sacs for storage, digestion, and waste removal • Contains water solution • Larger in plant cells • Help plants maintain shape by storing water http://library.thinkquest.org/12413/structures.html
  11. 11. Chloroplast • Uses the energy in sunlight to turn water and carbon dioxide into sugar and oxygen (a process called photosynthesis) • Usually found in plant cells • Contains green chlorophyll http://library.thinkquest.org/12413/structures.html
  12. 12. What are the differences between plant and animal cells? • Plant cells are much like animal cells, except for 3 important differences. – Plant cells have cell walls, which make them appear rectangular-shaped. These structures are composed of cellulose, hemicellulose, and a variety of other materials. – Plant cells have chlorophyll, the light-absorbing pigment required for photosynthesis. This pigment is contained in structures called chloroplasts, which makes plants appear green. – Plants cells have a large, central vacuole. While animal cells may have one or more small vacuoles, they do not take up the volume that the central vacuole does (up to 90% of the entire cell volume!). The vacuole stores water and ions, and may be used for storage of toxins.
  13. 13. Plant Cell vs Animal Cell
  14. 14. What am I, plant or animal?
  15. 15. Plant Cell Animal Cell
  16. 16. Pictures of cells Cancer cell being attacked by the immune system
  17. 17. Nerve Cells Cheek (Skin) Cells Liver Cells
  18. 18. A plant cell from the leaf of a poplar tree Plant cell with nucleus Seaweed under a microscope very visible
  19. 19. Stomach Cells Cardiac Muscle (Heart) Cells Muscle Cells Bone Cells
  20. 20. Very thin slice of plant skin Orchid (flower) cells Leaf Cells of Moss Cells in a plant root
  21. 21. Credit Slide • Pictures were found via yahoo image search. • Some information was found via yahoo search. • Some information was retrieved from Science-Class.net
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