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Trachea Tree

By David Maitland

Like a Medusa from another world a dissected tracheal tree from a silk moth caterpillar seems to loom out from the depths. Invertebrates like insects do not have lungs and instead air (and oxygen) diffuses through a tree-like network of tubes (trachea) which deliver oxygen, directly to every cell in the animal’s body. The tiny body air-tubes are prevented from collapsing by hoops of chitin. Light Microscope, Differential Interference Microscopy.

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