Document Detail

A comparative study of the microcirculation in the guinea-pig thymus, lymph nodes and Peyer's patches.
MedLine Citation:
PMID:  849659     Owner:  NLM     Status:  MEDLINE    
The circulatory patterns in three lymphoid tissues were compared macro- and microscopically. Indian ink or a viscous silicone rubber compound were used as contrast materials and serial 75 micronm sections examined. The findings were checked with the benzidine stain for red blood corpuscles in uninjected tissues. Thymic lobules showed a "through circulation"--capillaries penetrating the cortex from within outwards and draining into surface veins, comparable with the circulation in liver lobules. By contrast, lymph nodes and Peyer's patches showed a looped capillary distribution. The outer thymic cortex and primary follicles in lymph nodes contained the maximum capillary density, correlating with the highest mitotic index of thymocytes and lymphocytes in the respective tissues. The lowest vascular density in the thymus was in the medulla, particularly in Hassall's corpuscles, in secondary follicles of lympho nodes and Peyer's patches, which correlates with the storage capacity of antigens and antibodies at those sites. Postcapillary venules in lymph nodes and Peyer's patches showed a characteristic pattern with Indian ink. These venules were absent from the thymus.
J N Balu
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Clinical and experimental immunology     Volume:  27     ISSN:  0009-9104     ISO Abbreviation:  Clin. Exp. Immunol.     Publication Date:  1977 Feb 
Date Detail:
Created Date:  1977-05-27     Completed Date:  1977-05-27     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  0057202     Medline TA:  Clin Exp Immunol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  340-7     Citation Subset:  IM    
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MeSH Terms
Capillaries / anatomy & histology
Guinea Pigs
Lymph Nodes / blood supply*
Lymphoid Tissue / blood supply*
Peyer's Patches / blood supply*
Thymus Gland / blood supply*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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