From 1970 through 1977, the NFL season consisted of 14 regular season games and six exhibition games, sometimes but not always three at home and three away (the 1973 Washington Redskins, for instance, played five out of six preseason games at home), with some played at neutral sites.
Lymphocytes, the primary cells of the lymphatic system, make up roughly one-fourth of all white blood cells in the body. Like other white blood cells, they are produced in the red bone marrow. Lymphocytes constantly travel throughout the body, moving through tissues or through the blood or lymph vessels.
Cancer of the lymphatic system can be primary or secondary. Lymphoma refers to cancer that arises from lymphatic tissue. Lymphoid leukemias and lymphomas are now considered to be tumors of the same type of cell lineage. They are called leukemia when in the blood or marrow and lymphoma when in lymphatic tissue.ymphocytes are concentrated in the lymph nodes. The spleen and the thymus are also lymphoid organs of the immune system. The tonsils are lymphoid organs that are also associated with the digestive system.