Fill up the blanks in the following paragraph by selecting the correct option.
The movement of air into and out of the lungs is carried out by creating a (i).____ between the lungs and the atmosphere. Inspiration can occur if intra-pulmonary pressure is (ii).____ Expiration takes place when the intra-pulmonary pressure is (iii).____ than the atmospheric pressure. Expiration takes place when the intra-inspiration is initiated by the (iv).____ of diaphragm which (v).____the volume of thoracic chamber in the antero-posterior axis.
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Answer: 1. Volume 2. Less than atmospheric pressure nearly 758 to 759 mm of Hg 3. More than atmospheric pressure nearly 761 to 762 mm of Hg 4. External - inter - costal muscles of diaphragm 5. Increase In volume
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