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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