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
The ragtime composer Scott Joplin became famous through the publication in 1899 of the Maple Leaf Rag and a string of ragtime hits that followed, although he was later forgotten by all but a small, dedicated community of ragtime aficionados until the major ragtime revival in the early 1970s.