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
Joplin was tireless and selfless in his advocacy of his fellow ragtime composers, collaborating with James Scott, Arthur Marshall, Louis Chauvin, and Scott Hayden and helping to arrange others by Artie Matthews and the white New Jersey composer Joseph Lamb, whose work Joplin pitched to Stark.