Dear children, prepare yourselves to step into a broad and
miraculous world in a little while. In fact, this world
interests you closely. Although you might not have realised
until now, trillions of workers of this world have been
unceasingly working for you. You are surprised, aren't you? Our
bodies are composed of cells, each of which has assumed a
different task. The figure below shows a few types of our body
cells, which act together to enable us to live. I.Structurel
Connective Tissue Cell: This marvellous world is your body and
the workers which have been working for you are your body cells.
Every point of your body consists of cells. At this moment,
there are trillions of cells in your body that are at your
service. They are working even while you are reading this book.
For example, your eye cells are carrying out a number of
processes ceaselessly in order to enable you to read. As you
breathe, the cells in your windpipe and then the cells in your
lungs come into play. In the meantime, the cells in you