A centrifugal separating assembly for separating a fluid biological product into discrete components by centrifugation is disclosed. The assembly includes a first container defining a first cavity adapted to receive a human biological product, the first container having a circular upper wall, a cylindrical sidewall, and a concave shaped bottom wall. The assembly further includes a second container defining a second cavity adapted to receive discrete components, the second container having a convex shaped upper wall, a second cylindrical wall, and a circular bottom wall; and a tubular conduit providing fluid communication between the first cavity and the second cavity.