thanks to the perfect functioning of each of these compo-
nents, we can digest food. It is vital that components of
the digestive system be harmonious and complete be-
cause the whole system fails unless they are so.
Now let us give an example to illustrate why all the
components of a system should be complete for the proper
functioning of the system:
41
In our bodies, there is a life-
saving gate: the epiglottis
which is situated at the top of
the windpipe. This flap cov-
ers the opening to the air
passages when swal-
lowing, preventing
food or liquids from
entering the wind-
pipe.
Epiglottis open
Epiglottis
shut
