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
He went to Chicago for the World's Fair of 1893, which played a major part in making ragtime a national craze by 1897. Joplin moved to Sedalia, Missouri, in 1894 and earned a living as a piano teacher; there he taught future ragtime composers Arthur Marshall, Scott Hayden and Brun Campbell. Joplin began publishing music in 1895, and publication of his Maple Leaf Rag in 1899 brought him fame.