Page 368 - Veterinary Immunology, 10th Edition

VetBooks.ir Lymphocyte Populations

Lymphocytes are found throughout the body in lymphoid organs,
in blood, and scattered under body surfaces (Fig. 13.5). Despite

their uniform appearance, they are a diverse mixture of distinct
populations. Although these populations cannot be identified by
structural differences, they can be identified by their characteristic
cell surface molecules and by their behavior (Table 13.1). The
pattern of cell surface molecules expressed on a cell is called its

phenotype. By analyzing cell phenotypes, it is possible to identify
and classify many lymphocyte populations.

FIG. 13.5 The locations of lymphocytes within the body.

TABLE 13.1
Identifying Features of T and B Cells

Property B Cells T Cells
Develop within Bone marrow, bursa, Peyer's Thymus
patches
Distribution Lymph node cortex Lymph node paracortex

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