Lymph in the lymph vessels eventually reaches a lymph node -- there are about 100 nodes scattered throughout the body. Lymph nodes filter the lymph and also contain large numbers of white blood cells (a big part of the immune system), which remove foreign cells and debris from the lymph.When you get certain infections, the lymph nodes swell with billions of white blood cells working to clear the foreign cells causing the infection.ymph nodes filter the lymph and also contain large numbers of white blood cells (a big part of the immune system), which remove foreign cells and debris from the lymph. When you get certain infections, the lymph nodes swell with billions of white blood cells working to clear the foreign cells causing the infection.
Yellowstone: Annual Weather Averages. July is the hottest month in Yellowstone with an average temperature of 24Â°C (75Â°F) and the coldest is January at -2Â°C (28Â°F) .ellowstone: Annual Weather Averages. July is the hottest month in Yellowstone with an average temperature of 24Â°C (75Â°F) and the coldest is January at -2Â°C (28Â°F) .
Yellowstone National Park. Days are typically clear with less than 25 precent humidity. Temperatures are most comfortable in the spring and fall,with an average high/low of 85 and 50F (29 and 10C) respectively. Winter brings cooler days, around 60F (15C), and freezing nights.It occasionally snows at higher elevations.ellowstone National Park. Days are typically clear with less than 25 precent humidity. Temperatures are most comfortable in the spring and fall,with an average high/low of 85 and 50F (29 and 10C) respectively. Winter brings cooler days, around 60F (15C), and freezing nights.