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
Janis Joplin. Janis Lyn Joplin (/ËdÊÉplÉªn/; January 19, 1943 â October 4, 1970) was an influential American singer of the 1960s; her raw, powerful and uninhibited singing style, combined with her turbulent and emotional lifestyle, made her one of the biggest female stars of her era.