Each tonsil consists of a network of crypts (pits) that store cells used to fight infection. The tonsils contain B cells, a type of white blood cell that fights infections. They also produce antibodies against polio, streptococcal pneumonia, influenza, and numerous other infections.
Global Warming: What's Up With The Weather? is a DVD presentation of the television special by NOVA and Frontline dealing with questions raised about modern climate change.
Weather changes are due to differences in temperature, moisture content and pressure between the atmospheric air masses that circle the planet. Generally speaking, weather is determined by the current state of the atmosphere in a particular area, and is also affected by seasonal changes due to the Earth's rotation around the Sun. Keep Learning.