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
When Joplin was learning the piano, serious musical circles condemned ragtime because of its association with the vulgar and inane songs of Tin Pan Alley. As a composer Joplin refined ragtime, developing it from the dance music played by pianists in brothels in cities like St. Louis.he following is a complete list of musical compositions by Scott Joplin (ca. 1867âApril 1, 1917).