Insects
Respiratory System
Tracheal Tubes
Description
Insect trachea are a network of tiny tubes that go throughout the insect's body.
These tubes connect each cell of the body to the outside, through holes in the
abdomen (the tail section) called spiracles
Insects don't get their oxygen with lungs like we do. Instead,
their tracheal system allows each cell in the insect's body to get oxygen
directly from the outside air. Air can go in through the spiracles, travel through
the tracheal tubes, and go right to each cell.
Neat Stuff
Since oxygen can get from the air to the insect's cells directly, insects
don't need to carry oxygen in their blood like we do! That's why insect
blood isn't red: because it doesn't have the oxygen-carrying molecules that
make human blood red.
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