Lymphatic tissues are specialized structures in the body that play a crucial role in the immune system. They are primarily composed of lymphocytes, a type of white blood cell, and are found in various locations, including the lymph nodes, spleen, and thymus. These tissues help filter harmful substances and produce immune responses to protect the body from infections. The lymphatic system also includes lymphatic vessels, which transport lymph fluid containing immune cells throughout the body. This system works alongside the circulatory system to maintain fluid balance and support the body's defense mechanisms against pathogens and diseases.