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
exists and is an alternate of . Scott Joplin (between July 1867 and January 1868 - April 1, 1917) was an Afro-American composer and pianist, born near Texarkana, Texas, into the first post-slavery generation. During his brief career, Joplin wrote forty-four original ragtime pieces, one ragtime ballet, and two operas.