Centrifuge bowl for blood processing

A centrifuge bowl suitable for separating blood components, in particular concentrated red blood cells. A centrifuge bowl 10 comprises a core 14 having an annular portion 50A and a cylindrical outer wall 50. Annular portion 50A has a thick wall for minimizing the holdup volume of blood components within a collection chamber CC and the radially inner wall of the annular portion is disposed radially closely adjacent to the opening defined by skirts 24a, 25a. The outer wall 50 defines a separation chamber SC with bowl body 12 and its upper tapered portion defines a separation region S. Three slit-like openings 52 are formed at the junction between outer wall 50 and annular portion 50A, thereby prevent back flow while permitting flow of blood components from separation chamber SC to collection chamber CC. The upper end of outer wall 50 is formed with a cylindrical hub 50B extending toward the skirt member, which hub 50B serves to prevent fluid in collection chamber CC from flowing to the interior of bowl body 12 through central opening 56.