Physiological Anatomy of the Lungs

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                                arteries and veins have been injected with different 
colour, is the fact, that the mucous membrane of the 
Bronchial tubes of every part of the lungs, is of the 
same colour as that of the injection which has been 
passed into the pulmonary veins and is not like 
the remainder of the lung made up of an equal ad=
=mixture of capillaries, containing both colours;- 
so that if the pulmonary arteries have been perfectly 
injected with vermilion and the pulmonary veins 
with Chromate of Lead, the mucous membrane 
will be decisively and uniformly yellow, and this 
yellow colour will be caused by the plexus, which lines 
the Bronchial tubes being fully injected by that fluid 
which entered the pulmonary veins; and if the 
colour of the injection has been reversed then also 
the colour of the mucous membrane will be reversed, -
and the contrast will be as striking in the opposite 
way: the mucous membrane will then be uni=
=formly red. It will be impossible to impart 
anything like the same depth of colour to the 
mucous membrane, by any amount of injection 
by the Broncial artery, and it is only by the most 
complete injection possible of this latter artery, that 
any vessels in communication with it can be made to shew themselves 
                            
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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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