Page 58 - DK Children's Encyclopedia
P. 58

Cells                                                                             SEE ALSO

                                                                                               ▸ ▸ Body cells  p.41
                                                                                               ▸ ▸ Genes  p.119
           Living things are made from tiny parts that stick                                   ▸ ▸ Heart  p.128
           together, called cells. Cells come in different shapes                              ▸ ▸ Photosynthesis
           and sizes depending on the job they do. They can                                     p.191

           divide and make copies of themselves.                                               ▸ ▸ Plants  p.194
                                                                                               ▸ ▸ Sickness  p.225



       Plant cell                           Cell wall        Cytoplasm
       Plant cells can collect air and make   The strong outer   This is the liquid inside     Bacteria
                                                             the cell that everything
                                            wall gives the
       their own food from sunlight. They   cell and plant   else floats in. Chemicals         Bacteria are living things
       have a strong cell wall, which gives   their shape.   mix together here.                made from just one cell.
       the plant strong stems                                                                  They can divide to make
       and leaves.                                                        Cell membrane        copies of themselves. This
                                                                                               is how germs spread and
                                                                          The cell membrane is   make us sick.
                                                                          a barrier that keeps
                                                                          the cytoplasm inside
                                                                          the cell.


                                                                             Nucleus
                                                                             The nucleus
                                                                             controls the cell
                                                                             and contains
                                                                             instructions
                                                                             called genes.




                                                                                 Animal cell
                                                                                 Animal cells use oxygen to break down
                                                                                 sugar and make energy. Animals get sugar
                                                                                 from the food they eat, while oxygen gets
                                                                                 to the cells through the blood.



                                                                            Cell membrane




                                                                            Cytoplasm




                                                                            Nucleus





       Mitochondrion                                  Vacuole
       This is where energy   Chloroplast             The vacuole is a storage
       from sugar is released    Chloroplasts collect   bubble filled with liquid
       to power the different   sunlight and use air and   food, water, or waste.  Mitochondrion
       parts of the cell.   water to make food.
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