
the wind passage. The division of the Bronchial tubes however instead of being either dichotomous or trichotomous in any part of the lungs, is strictly that of a panicle - In every part a straight diminishing tube may be discovered, which strictly resembles the mid-rib of a leaf, and from this branches are given off alternately on each side of it, throughout its whole length - Each of these secondary branches follow out precisely the same plan of distribution and this continues to be repeated down to the ultimate terminations of the minutest Bronchial tubes - The drawings in Series A No 1 shews the so called 'bifurcation' of the trachea in the human lung, from which it will be seen that the left Bronchus is merely a branch given off from the mainstem of the windpipe, and does not constitute a binary division - A drawing in Series A No 2 exhibits the branch, which is given off in the sheep's lung to the upper lobe of the right lung, previous to the left Bronchus leaving the trachea, and in this case (as universally prevails in quadrupeds) the left Bronchus is the second branch given off from the trachea -
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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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