Fill in the space with the appropriate word from the word-bank below; causing During inhalation, the diaphragm and intercostal muscles 36... 37................ in the volume of the chest-cage. This creates 38................ pressure in the lungs and causes air to flow from 39................... During exhalation, the diaphragm and intercostal muscles 40..................... causing 41.................. of the volume of the chest-cage. This creates 42................. pressure in the lungs and causes air to flow from 43................ ● Inside to outside ● ● ● ● ● Expansion Compression Relax Constrict Outside to inside

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