
is corrugated, in order to complete that branch of the subject which relates to the general structure of the lungs - The Rugae. These rugae mark out the direction of certain longitudinal fibres, which are placed immediately beneath the mucous membrane The rugae are obviously caused by the con= =tractile property of the circular fibres, which embrace and surround the longitudinal ones. Longitudinal and circular fibres The rugae are only visible when the diameters of the Bronchial tubes have been diminished by the contraction of the circular fibres. When the whole lung has been kept distended for some days, by pumping salt and water or some other viscid liquid into the Bronchial tubes, the tendency of these tubes to contract in their diameters will be overcome, and the mucous surface will then present a smooth appearance free from any rugae. Fibrous capsules The contractile fibres, both longitudinal and circular, are continuous with the fibrous tissue, which has already been described as an expansion of the outer coat of the
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Manuscript details
- Author
- James Newton Heale
- Reference
- AP/43/4
- Series
- AP
- Date
- 1860
- IIIF
-
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Cite as
Physiological Anatomy of the Lungs, 1860. From The Royal Society, AP/43/4
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