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
Scott Joplin's exact date of birth and location is not known, though it is estimated that he was born between the summer of June 1867 and January 1868. Born to Florence Givens and Giles Joplin, Scott grew up in Texarkana, a town situated on the border between Texas and Arkansas. The Joplins were a musical family, with Florence being a singer and banjo player and Giles a violinist; Scott learned how to play the guitar at a young age and later took to the piano, displaying a gift for the instrument.