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Gas Exchange Cheat Sheet (DRAFT) by

This is a draft cheat sheet. It is a work in progress and is not finished yet.






Key Factor­s/Parts and Descri­ptions

opens and closes to minimize water loss. Air intake in through the thorax. Air output through the body.
Hairs around spiracles
Traps humidity to minimize water loss. Allows to keep a lower concen­tration gradient of water vapor so that the rate of diffusion is not so high.
The major tube that runs along the length of the insect.
A very thin tube that squeezes between individual cells. Lacks Chitin
Air Sacks
Present in larger insects. Inflates and deflates to help movement of air
Muscular Pumping
rings of muscles around the trachea squeeze in succession to force air along
Metabolic Rate
Relatively High
Chiton Rings
Rings of chiton support trachea.
Availa­bility of oxygen
21% O2 in air
Surface Area
Tracheal tubes connecting directly to cells. Massive SA:V ratio
Fluid along the tracheoles
Increases diffusion rate