CBSE BoardEnglish MediumSTD 10ScienceLife Processes2 Marks
Question
Respiratory surface of animals must always be moist. Why?
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Answer
The respiratory surface of animals must always be moist for better diffusion of gases. The respiratory surface is moist in order to facilitate the exchange of gases-Oxygen and Carbon dioxide. Respiratory system is covered with moist epithelial cells which helps in exchange of gases. These gases can be transported across the cell membrane only, when dissolved in water. Therefore , Respiratory system must be Moist.
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