Human needs air to
breathe, it is the oxygen in air that your body really needs. Every cell in your body needs oxygen to help
it metabolize or burn the nutrients release from food for energy. You need the food that gives you energy but
oxygen is also needed to break down the food into pieces that are small enough
for your cells to use and this is what is called as cellular respiration and it
is the process of oxidizing food molecules like glucose to carbon dioxide and
water. The energy release is chemically
trapped for use by all the energy consuming activities in the cell. Your cells are the energy converters in your
body.
As you can see all the
parts of your body are made up of cells.
Your body has many different kinds of cells, though they may look
different under a microscope, most cells have chemical and structural features
in common. In human there are about 200
different types of cells and within these cells you will find that there are
about 20 different types of structures or organelles.
Different cells have
different jobs to do and each cell has a size and shape that is suited for its
job. Cells that do the same job combine
together to form certain body tissue, such as muscle, skin or bone tissue. Groups of different types of cells make up
the organs in your body such as lungs, liver and heart. Each organ then has its own job to do, but
all these organs work in synchronization to maintain your body and all the
systems in your body are like members of a team whose job is to keep you alive
and healthy.
cont’d..
