CBSE Class 7 Answered
(i) Identify A and B in the given diagram.
(ii) What is the composition of the air which we inhale and exhale?
(ii) What is the composition of the air which we inhale and exhale?
Asked by Topperlearning User | 09 Mar, 2015, 10:51: AM
Expert Answer
(i) A is Trachea; B is Diaphragm.
(ii) During inhalation, we take about 21% oxygen and 0.04% carbon dioxide in our lungs. While during exhalation, 16.4% oxygen and 4.4% carbon dioxide is taken out of the lungs.
Answered by | 09 Mar, 2015, 12:51: PM
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