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flow of water in the gill chamber of fish allows for respiration, water passes one way and blood flows the other
process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated
breathing, transport of gases, and exchange of gases with tissue cells; Provides O2 for cellular respiration and removes its waste product, CO2
Tubes that bring gases in from the outside, in a series on each side of the body of an insect
membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi
In insects, narrow tubes branching from trachea and making direct contact with cells to facilitate gas exchange.
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