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Gas exchange in Insects

There are tiny holes
called spiracles along
the side of insects.

The spiracles are
openings of small tubes
running into the insect's body; the larger ones are called tracheae
and the smaller ones being called tracheoles.

The ends of these tubes, which are in contact with…

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Gas Exchange in Plants

Plants obtain the gases they need through their leaves. They
require oxygen for respiration and carbon dioxide for

The gases diffuse into the intercellular spaces of the leaf through
pores, which are normally on the underside of the leaf - stomata.
From these spaces they…


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