System for sealingly attaching a mobile container onto a cell and for opening this container towards the inside of the cell, with the system comprising: - a cell flange, - a cell door sealed to the cell flange: - a container flange, - a container door that is sealed with respect to the container and cell flange, with the container being arranged to be sealingly attached and temporarily on the cell by their respective flanges which are placed one against the other, with their container and cell doors being placed against one another by two contact faces facing each other while still arranging between them a space that is sealingly insulated by means of sealing when the two faces are against one another a radial surface of a crown of the cell door being arranged to press against a surface mobile for actuating the container door that actuates, via its displacement, during the putting into contact of the two contact faces, first means of locking of the container door on the cell door, in order to release the container door of the container flange, the first means for locking having a surface mobile for actuating constituted by a first surface of a flexible membrane of the container door of which a second surface presses on an inclined face of locking latches constituting the first means for locking protruding into an inner groove of an inner surface of the container flange, in order to cause to exit each locking latch from the inner groove of the container flange, with the purpose of detaching the container door of the container flange. - a cell flange, - a cell door sealed to the cell flange: - a container flange, - a container door that is sealed with respect to the container and cell flange, with the container being arranged to be sealingly attached and temporarily on the cell by their respective flanges which are placed one against the other, with their container and cell doors being placed against one another by two contact faces facing each other while still arranging between them a space that is sealingly insulated by means of sealing when the two faces are against one another a radial surface of a crown of the cell door being arranged to press against a surface mobile for actuating the container door that actuates, via its displacement, during the putting into contact of the two contact faces, first means of locking of the container door on the cell door, in order to release the container door of the container flange, the first means for locking having a surface mobile for actuating constituted by a first surface of a flexible membrane of the container door of which a second surface presses on an inclined face of locking latches constituting the first means for locking protruding into an inner groove of an inner surface of the container flange, in order to cause to exit each locking latch from the inner groove of the container flange, with the purpose of detaching the container door of the container flange. - a container flange, - a container door that is sealed with respect to the container and cell flange, with the container being arranged to be sealingly attached and temporarily on the cell by their respective flanges which are placed one against the other, with their container and cell doors being placed against one another by two contact faces facing each other while still arranging between them a space that is sealingly insulated by means of sealing when the two faces are against one another