You are in Medical Library . This brief article gives some physiological information about the relationship between blood cell formation and lymphocytes, and how leukemia affects that process. Myeloid Cell Line. Lymphoid Cell Line. Lymphocytes and the Lymph System Lymphocytes .
B cells complete their structural growth and differentiation and mature in the bone marrow.
Lymphocytes leave these organs through the blood stream, which takes them to the heart and then to the arteries, which eventually branch out into the tiny capillaries. A proportion of these lymphocytes then enters the lymphatic vessels, which help form the lymph system. Along the way, the fluid passes through lymph nodes, which are dense, oval structures composed of lymph vessels, connective tissue, and white blood cells. Here, the lymphocytes are either filtered out or are added to the contents of the node. Because of its role in forming and concentrating lymphocytes, the lymphatic system can be viewed as a major line of defense against infectious and invading organisms.