What is the product that is released by the respiratory system when a person exhales ?

C₆H₁₂O₆+6O₂-->6CO₂+6H₂0

This is the chemical equation for aerobic respiration.

The product that is excreted through the lungs is carbon dioxide(CO2)

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.