Final answer:
Lymphopoiesis is the process of lymph formation, where lymphocytes are produced and differentiated in lymphatic tissues such as the lymph nodes, spleen, and thymus.
Step-by-step explanation:
The formation of lymph is called lymphopoiesis. Lymphopoiesis is the process by which lymphocytes, a type of white blood cell, are produced. Lymphocytes are formed from lymphoid stem cells, which migrate from the bone marrow to lymphatic tissues where their production and differentiation continue. In the lymphatic tissues, such as the lymph nodes, spleen, and thymus, lymphocytes develop and mature, playing a crucial role in the immune response.