Define the following terms?

a. Tidal volume


b. Residual volume


c. Asthma



a. Tidal Volume: Volume of air inhaled and exhaled during a normal breathing cycle without any forced breathing is tidal volume.The normal range of tidal volume in a young adult is 500 ml per inspiration.


b. Residual Volume:Volume of air left in the lungs even after forced exhalation is called as residual volume. The normal range of residual volume in a young adult is 1100-1200 ml.


c. Asthma:It is an inflammatory disease of the airways of the lungs. Due to which the airway gets narrowed and excess mucus secretion takes place resulting in breathing difficulty.


Symptoms of Asthma:


1. Wheezing


2. Breathing Difficulty


3. Coughing


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