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.
What the lymphatic system is. The lymphatic system is a system of thin tubes and lymph nodes that run throughout the body. These tubes are called lymph vessels or lymphatic vessels. The lymph system is an important part of our immune system.It plays a role in fighting bacteria and other infections and destroying old or abnormal cells, such as cancer cells. You can read detailed information about the immune system and cancer.he diagram shows the lymph vessels, lymph nodes and the other organs that make up the lymphatic system. The lymphatic system is similar to the blood circulation. The lymph vessels branch through all parts of the body like the arteries and veins that carry blood.