Physiological Anatomy of the Lungs

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                                supply to any other portion; it makes no sort of 
anastomosis either with its own branches or with 
any other vessels until it reaches its final destination 
and then the distribution of every portion of it is exactly 
alike and that  distribution is solely and entirely 
to the leaflets. When the bronchial tube spreads 
out into its final pedicels, the corresponding ultimate 
twig of the pulmonary artery expands into a very 
remarkable capillary reticulation. This reticulation is 
a meshwork of minute capillaries which anas=
=tomose together in the most intimate manner; and this 
anastomosis is not confined to the meshes of each 
terminal twig of pulmonary artery but there is 
likewise a close intercommunication between 
the capillary networks of adjoining leaflets, 
so that like the Bronchial tubes the trunks of 
every subdivision of the Pulmonary artery are 
kept wholly asunder and distinct until they 
arrive at their final distribution, and then the 
most equal and free intercourse is established 
between all the capillaries. 
The course and distribution of each pulmonary 
artery accompanying the minute Bronchial tubes 
are delineated in the drawings in Series C No1 fig a & fig b, 
and their final distributions in the leaflets are shewn in 

                            
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Manuscript details

Author
James Newton Heale
Reference
AP/43/4
Series
AP
Date
1860
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Physiological Anatomy of the Lungs, 1860. From The Royal Society, AP/43/4

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