The immune system includes certain types of white blood cells. It also includes chemicals and proteins in the blood, such as antibodies, complement proteins, and interferon. Some of these directly attack foreign substances in the body, and others work together to help the immune system cells.
Scott Joplin. Scott Joplin was the best-known American ragtime musician and composer, setting the standard for all that followed. Ragtime â which gave birth to Jazz â has a rhythm in which the accompaniment is strict two-four time and the melody, with improvised embellishment, is in steady syncopation. Joplin`s instrument of choice was the piano. Early days
Later in 1899, Scott Joplin, an American pianist and composer, released âMaple Leaf Rag,â which turned out to be one of the most influential pieces of the era. His beloved hit brought a bit of sophistication to the ragged rhythm and became memorable; however, that was not to be his only great contribution to music. The well-known King of Ragtime composed 44 ragtime jazz pieces, 2 operas and 1 ballet.