Dictionary of Biological Psychology
The lymphatic system is a network of vessels, glands and tissues that works to take fluid from the spaces between cells (the interstitial spaces or interstices) and returns both fluids and proteins to the BLOOD in veins around the shoulders (when in the lymphatic system this fluid is called LYMPH). Within the lymphatic system are several organs (Peyer’s patches [around the small intestine], spleen, adenoids, tonsils, appendix) and lymph nodes.
When passing through these nodes the lymph will be brought into contact with LYMPHOCYTES. These are immature forms of B CELL and T CELL, on their way to completing their development in either the THYMUS GLAND (T cells) or bone marrow (B cells) having originated from STEM CELLS in the liver and bone marrow. The actions of lymphocytes within the lymph nodes is an important part of the IMMUNE SYSTEM response to infection and disease.
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