Respiratory
system
Lungs help
us breathe and take out the waste. The system starts with the nose, we breathe
in all the gases through our nose and then it passes to the nasal cavity. The
gasses go to our wind pipe (trachea).
Later,
here are pipes called bronchia which separate all the gases to the lungs. After
that, the alveoli takes oxygen and passes the other gases back to the wind
pipe.
Finally,
the oxygen is send to the capillaries that gives blood to the whole body. This
system is called the respiratory system.
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