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, (born 1867/68, Texas, U.S.âdied April 1, 1917, New York, New York), American composer and pianist known as the âking of ragtimeâ at the turn of the 20th century. Joplin spent his childhood in northeastern Texas, though the exact date and place of his birth are unknown.