The respiratory sistem is one of the four important sistems:digestive sistem,
excretory sistem,circulatory sistem and there is one more
that is the nervous sistem.
It consist of muscles and organs and there are
some bones that protect it.
And the respiratory sistem make us breathe.
It has the intake of the exchange
of oxigen and carbon dioxide,both of them are gas.
The parts are:paranasal sinuses, respiratory center,nose hairs,
nasal cavity,pharinx,esophagus,epiglottis,larinx,trachea,the two bronchies,
the pulmonary vessels,the lungs,diaphagm and ribs.
Some animals have a diferent respiratory sistem than us,like the fish that have gills.
And to finish i have a video.
i like the video
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