Fluidic module intended to form part of a system for circulating fluid between at least one first body or housing and at least one second body or housing, this system comprising an arrangement of multiple fluidic connections (4, 4', 4", 4′′′) between, on the one hand, said first body or housing provided with at least two mutually distinct openings (5, 5', 5", 5′′′) and, on the other hand, at least one second body or housing also comprising mutually distinct openings (6, 6', 6", 6′′′), each connection establishing a leaktight fluidic connection between an opening of the first body or housing and an opening of the second body or housing, or of one of the second bodies or housings, and each of the fluidic connections (4, 4', 4 11, 4''') being of a rigid but articulated type, the fluidic module consisting of a preassembled structural and functional unit which incorporates, on the one hand, said first body or housing of which the distinct openings (5, 5', 5", 5′′′) are each provided with a corresponding straight, curved or angled rigid female tube (7, 7', 7", 7′′′), and, on the other hand, rigid ducts (9, 9', 9'', 9′′′) of suitable shapes which are respectively nested in said various female tubes (7, 7', 7", 7′′′), these various pairs of mutually nested rigid tubular elements [tubes (7, 7', 7'', 7''')/ducts (9, 9', 9'', 9"')] being configured to constitute, in respective cooperation by nesting with rigid male fittings (8, 8', 8'', 8′′′) equipping the openings (6, 6', 6", 6′′′) of said at least one second body or housing, a leaktight fluidic connection (4, 4', 4'', 4′′′) provided with a limited capability at least for rotational and angular, and possibly also translational, relative displacement between these first and second bodies or housings (2 and 3), each nested tube/duct/fitting assembly, formed of mutually nested tubular elements made of rigid plastic material, constituting a leaktight fluidic connection (4, 4', 4 11, 4''') provided with a limited capability at least for rotational and angular, and possibly also translational, relative displacement at least at the relevant tube/duct nesting, and possibly also at the relevant duct/fitting nesting, the fluidic module being characterized in that the first body consists of a directional-control valve body with at least two ports, preferably with at least three or four ports, and in that the second body consists of a directional-control distributor plate, preferably of the type incorporating ducts rigidly connected to one another, advantageously situated largely in the same plane and each being terminated at one of its ends by a respective fitting (8, 8', 8'', 8′′′). the fluidic module consisting of a preassembled structural and functional unit which incorporates, on the one hand, said first body or housing of which the distinct openings (5, 5', 5", 5′′′) are each provided with a corresponding straight, curved or angled rigid female tube (7, 7', 7", 7′′′), and, on the other hand, rigid ducts (9, 9', 9'', 9′′′) of suitable shapes which are respectively nested in said various female tubes (7, 7', 7", 7′′′), these various pairs of mutually nested rigid tubular elements [tubes (7, 7', 7'', 7''')/ducts (9, 9', 9'', 9"')] being configured to constitute, in respective cooperation by nesting with rigid male fittings (8, 8', 8'', 8′′′) equipping the openings (6, 6', 6", 6′′′) of said at least one second body or housing, a leaktight fluidic connection (4, 4', 4'', 4′′′) provided with a limited capability at least for rotational and angular, and possibly also translational, relative displacement between these first and second bodies or housings (2 and 3), each nested tube/duct/fitting assembly, formed of mutually nested tubular elements made of rigid plastic material, constituting a leaktight fluidic connection (4, 4', 4 11, 4''') provided with a limited capability at least for rotational and angular, and possibly also translational, relative displacement at least at the relevant tube/duct nesting, and possibly also at the relevant duct/fitting nesting, the fluidic module being characterized in that the first body consists of a directional-control valve body with at least two ports, preferably with at least three or four ports, and in that the second body consists of a directional-control distributor plate, preferably of the type incorporating ducts rigidly connected to one another, advantageously situated largely in the same plane and each being terminated at one of its ends by a respective fitting (8, 8', 8'', 8′′′).