You are made of cells. Everybody is made of cells. So, what are cells
anyway? If you look at yourself through a microscope, you’ll see that you are
divided into tiny sections. These sections are called CELLS.
Cells live with other cells like them in groups called tissues. Cells
are full of a jelly-like fluid called CYTOPLASM. The Cytoplasm is surrounded by
the CELL MEMBRANE, which keeps the waste out. Cells have a NUCLEUS which acts
like the brain of them.
Cells carry out very specialized functions in your body and, as a
result, they can look very different: There are bone cells, muscle cells, nerve
cells, cartilage cells, sperm cells, small intestine cells, red blood cells…
You have seventy five trillion cells! They could spread throughout the
Earth 47 times!
We grow up because the cells can reproduce!