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High endothelial venules

High endothelial venules (HEVs) are modified, postcapillary venules lined by a simple cuboidal, rather than the simple squamous epithelium lining other venules. This modification allows lymphocytes to leave the blood through the HEVs and enter the lymphoid tissue. HEVs are located in the appendix, Peyer’s patch, tonsil (seen here) and lymph node. 600x

High endothelial venules <p>High endothelial venules (HEVs) are modified, postcapillary venules lined by a simple cuboidal, rather than the simple squamous epithelium lining other venules. This modification allows lymphocytes to leave the blood through the HEVs and enter the lymphoid tissue. HEVs are located in the appendix, Peyer’s patch, tonsil (seen here) and lymph node. 600x</p>

High endothelial venules

High endothelial venules (HEVs) are modified, postcapillary venules lined by a simple cuboidal, rather than the simple squamous epithelium lining other venules. This modification allows lymphocytes to leave the blood through the HEVs and enter the lymphoid tissue. HEVs are located in the appendix, Peyer’s patch, tonsil (seen here) and lymph node. 600x

Venules <p>High endothelial venules (HEVs) are modified, postcapillary venules lined by a simple cuboidal, rather than the simple squamous epithelium lining other venules. This modification allows lymphocytes to leave the blood through the HEVs and enter the lymphoid tissue. HEVs are located in the appendix, Peyer’s patch, tonsil (seen here) and lymph node. 600x</p>

Venules

High endothelial venules (HEVs) are modified, postcapillary venules lined by a simple cuboidal, rather than the simple squamous epithelium lining other venules. This modification allows lymphocytes to leave the blood through the HEVs and enter the lymphoid tissue. HEVs are located in the appendix, Peyer’s patch, tonsil (seen here) and lymph node. 600x

Diffuse lymphoid tissue <p>High endothelial venules (HEVs) are modified, postcapillary venules lined by a simple cuboidal, rather than the simple squamous epithelium lining other venules. This modification allows lymphocytes to leave the blood through the HEVs and enter the lymphoid tissue. HEVs are located in the appendix, Peyer’s patch, tonsil (seen here) and lymph node. 600x</p>

Diffuse lymphoid tissue

High endothelial venules (HEVs) are modified, postcapillary venules lined by a simple cuboidal, rather than the simple squamous epithelium lining other venules. This modification allows lymphocytes to leave the blood through the HEVs and enter the lymphoid tissue. HEVs are located in the appendix, Peyer’s patch, tonsil (seen here) and lymph node. 600x

Main Slide High endothelial venules Venules Diffuse lymphoid tissue