Physiological Anatomy of the Lungs

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                                =nary veins - At the spot where the pedicels 
are given off, the structure of the Bronchial 
tubes splits as it were into two layers: the 
thicker, firmer, and most elastic of the two 
expands and encloses an ultimate portion 
of the lungs (called in this treatise a leaflet), 
and becomes continuous with the fibrous tissue, 
which encloses the rest of the parenchymetic 
structure, dipping down between the different 
lobules and leaflets, so as to form the sulci, 
by which they are divided - Five or six of 
these pedicels are usually given off at the 
spot, where the Bronchial tube undergoes 
this change, and each of these enters a distinct 
leaflet, but each of these leaflets receives nu=
=merous pedicels, each given off from a sepa=
=rate ultimate <s>[text?]<\s> bronchial tube. 
Each pedicel on entering the leaflets, expands 
into processes, which extend to the perimeters 
of the leaflet and divide its interior into 
numerous compartments - These compartments 
usually go by the name of 'air-cells. 
Air-cells. 
They are formed in a manner strongly 
resembling that, by which the Hyloid membrane 

                            
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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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