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Investigating the Breathing Rates of Locusts. Results Breathing Rate 30s-1 Percentage CO2 Locust 1 Locust 2 Average of Both 5 22 16 19 10 29 20 24.5 15 54 48 51 20 72 64 68 Conclusion As you can see from the graphs above, there is a general trend, between the two locusts. The graph shows that the higher the CO2 concentration in the atmosphere that the locust breathes in, the more breaths in 30 seconds that it takes. So when we increased the concentration of carbon dioxide, in the atmosphere of the locust, it will breathe more. The reason that the locust's breathing rate increases, when there is an increase in the percent of Carbon dioxide in the locusts' environment, is that carbon dioxide directly affects the breathing rate. In locusts, the ventilation centre, in the metathracic ganglion, makes the control of the breathing rate. This is stimulated by nerve signals, which are emitted from carbon dioxide stimuli, which are called chemoreceptors, which are situated in the nerve ganglion. So when the ventilation...

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