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
Later in 1899, Scott Joplin, an American pianist and composer, released âMaple Leaf Rag,â which turned out to be one of the most influential pieces of the era. His beloved hit brought a bit of sophistication to the ragged rhythm and became memorable; however, that was not to be his only great contribution to music. The well-known King of Ragtime composed 44 ragtime jazz pieces, 2 operas and 1 ballet.