A medical bag having at least two compartments, a peelable seal between the compartments, a permanent seal on the contour of the bag and at least one filling tube further comprising an opening with no seal on one of the compartments. The at least one tube for filling, comprises an opening with no seal on one of the compartments, and it comprises two labels on the compartment, a label being located on the rear side and the other label being located on the front face of the bag, the opening onto one of the compartments constituting a film excess on top of a label, the excess being sealed only on one of the sides, but not horizontally and being flexible enough to facilitate easy opening.
