44 
Transactions of the Society. 
Brunner’s glands. The glands of Lieberkuhn are cut in different 
planes, and lie within spaces formed by connective tissue bands. 
In the non-rugose parts (text-fig. 10) the connective tissue forms 
finger-like or club-shaped processes (a), surrounding large spaces, 
at the periphery. The muscular coat is well developed, and has 
the usual longitudinal and circular layers, and the former is a 
complete layer. The blood-vessels are wide and thin walled. 
The most characteristic feature of the large intestine, whose 
absorptive and digestive functions reach a high degree, is the 
presence of large blood-vessels between the glands and muscularis 
mucosae. 
It appears, therefore, that the characteristic features of the 
gastro-intestinal tract are : — 
1. The large amount of connective tissue. 
Text-Fig. 11. — Section through the lung showing three alveoli, 
constituting an entire field when examined through a l/6th objective 
and x 10 eyepiece. 
2. The glands are highly developed and the entire intestinal 
tract is short. 
3. The muscularis mucosae is well developed everywhere. 
4. The blood-vessels are wide and thin walled. 
5. The histological characters of the mechanical and glandular 
areas are very different. 
6. The duodenum is not the only part where glands are found 
outside the muscularis mucosae. 
7. Lymphoid cells form aggregations in the mucosa of the 
stomach and intestines. 
The histology of the liver and pancreas are described in my 
paper mentioned in the foot-note on p. 37. 
