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
Scott Joplin (c.1867-1917) is known as the King of Ragtime.. One of the earliest African-American composers to have his works published, Joplin brought a classical sensibility to ragtime, which had served as music for popular entertainment rather than as art music.Although he is best known for his piano rags, he also wrote several songs and the opera Treemonisha.ne of the earliest African-American composers to have his works published, Joplin brought a classical sensibility to ragtime, which had served as music for popular entertainment rather than as art music. Although he is best known for his piano rags, he also wrote several songs and the opera Treemonisha.