Immune system disorders cause abnormally low activity or over activity of the immune system. In cases of immune system over activity, the body attacks and damages its own tissues (autoimmune diseases). Immune deficiency diseases decrease the body's ability to fight invaders, causing vulnerability to infections. Vasculitis. 2  The immune system attacks and damages blood vessels in this group of autoimmune diseases. 3  Vasculitis can affect any organ, so symptoms vary widely and can occur almost anywhere in the body. 4  Treatment includes reducing immune system activity, usually with prednisone or another corticosteroid.
Comments about Denis Wick DW5531 Series Adjustable Trumpet Cup Mute: This cup mute is a fantastic value and is versitle. The adjustable cup is great when switching between trumpets with different bell sizes to get the right gap between the bell and cup. It is esspecially helpful when the music calls for tight cup mute.
How Brass Instruments Work. Brass instruments are any tube that can be played with the lips. They're not always brass, as instruments like the Aborigine digeridoo, and the conch shell, are made of wood, and shell, respectively. However, most modern brass instruments have a long, cone-shaped tube and flaring bell. Usually the tube is coiled in order to make it easier to hold. Often they have valves or other mechanisms to extend the range of notes that can be played with the instrument. Making Sound . Modern brass instruments produce sound through a metal mouthpiece. The mouthpiece is similar on most brass instruments, usually varying only in size. Sound is produced by placing the lips on the mouthpiece and blowing while vibrating the lips. The larger the mouthpiece, the lower the sound of the instrument. Playing Different Notes