. Cosmic law; the immortality of the soul and the existence of God. ry of Creative design, it isimpossible to conceive of such a muscle as the diaphragmgrowing across the great cavity of the body. No chance couldcause it to grow there. Think of blind and unreasoning Evo-lution producing such an organ! How would she go aboutthe work of constructing it? It is to be a thin but strongsheet spanning a great open space, as a suspension bridgespans the open space between the banks of a river. Man con- 112 THE BKEATHING APPARATUS structs suspension-bridges by leading separate wires acrossthe river, an
. Cosmic law; the immortality of the soul and the existence of God. ry of Creative design, it isimpossible to conceive of such a muscle as the diaphragmgrowing across the great cavity of the body. No chance couldcause it to grow there. Think of blind and unreasoning Evo-lution producing such an organ! How would she go aboutthe work of constructing it? It is to be a thin but strongsheet spanning a great open space, as a suspension bridgespans the open space between the banks of a river. Man con- 112 THE BKEATHING APPARATUS structs suspension-bridges by leading separate wires acrossthe river, anchoring their ends firmly at each bank, and thenwrapping the wires with other wires to hold them togetherin the form of a cable. With two such cables, parallel to eachother, it is an easy matter to connect them by cross-beamsand to support the floor or deck of the bridge upon thecross-beams. But nature cannot use that mode of construc-tion ; and, besides, the chasm to be bridged is circular and itswalls must be firmly connected to the bridge all around Fig. 5. Diagram showing chest and diaphragm. I, Diaphragm when lungs are deflated; II, Diaphragm when lungs are partially inflated; III, Diaphragm in position to inflate lungs fully. Nature therefore proceeds on a different plan. She drawsa line (so to speak) around the inner wall of the trunk, indi-cating where the edges of the diaphragm are to be she causes minute muscle-fibres (millions of them) tostart out all along that line and grow towards the centre ofthe circle, where they finally meet and become united in astrong central tendon. These growing muscle-fibres are lat-erally connected together throughout their whole length, so THE BREATHING APPARATUS 113 that when their ends meet at the centre, the entire chasmhas become completely decked over by a strong sheet or webof muscular tissue. Meanwhile, she establishes a connectionbetween the muscle-fibres and the brain, by means of motornerves that enab
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