The structures which are part of the upper respiratory system include the following:
<h3>What is Respiratory system?</h3>
This is the system which is involved in the gaseous exchange of organisms and consists of organs such as lungs etc.
The parts mentioned above are found in the upper respiratory tract of most animals.
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Answer: it will take more stimulation to reach the threshold.
Answer: Due to formation of carbonic acid, increased CO2 level will decrease the pH of earth waters.
Carbon dioxide could form carbonic acid when dissolved into water. Since it was acid, it will lower the pH of the water. The level of carbon dioxide in human body is regulated because of the same reason. Higher or lower pH will have a harmful effect on the organism that live in the water.
TRUE. Most drugs are eliminated by the kidneys in urine although some are excreted in saliva, sweat, or exhalation.