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.
Off-site search results for Scott Joplin... African Americans - Scott Joplin, King of Ragtime Scott Joplin Known as the King of Ragtime, this son of a former slave was born circa 1867 in Texas and may have had access to a piano in the white-owned house in which his mother worked. He's best known for The Maple Leaf Rag
He went to Chicago for the World's Fair of 1893, which played a major part in making ragtime a national craze by 1897. Joplin moved to Sedalia, Missouri, in 1894 and earned a living as a piano teacher; there he taught future ragtime composers Arthur Marshall, Scott Hayden and Brun Campbell. Joplin began publishing music in 1895, and publication of his Maple Leaf Rag in 1899 brought him fame.