It isnt. There is no gas exchange in the trachea this takes place at the alveoli.
earthworms.
presence of many capillaries
they are connected to a densed network of blood vessels which keeps the oxygen moist
Epithelial lining between the alveoli wall and the blood capillaries is thin to provide a shorter diffusion distance for easy gaseous exchange.
It's one of these-lack of blood vesselspresence of villipresence of many capillarieslack of cell membranes
If you are looking for a single organelle, then I would say the mitochondria. They are the site of respiration and are adapted for efficient gas exchange.
XD
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flatworm
Two ways in which the structure of a capillary is adapted to its function is to encourage the exchange of oxygen. Another reason is to encourage the exchange of carbon dioxide.
Gas exchange is a function of respiration not digestion.