Device and method for producing a fluidic connection between cavities

A device, comprising:

• A substrate having first and second spaced apart surfaces;
• First and second adjacent cavities extending from the first surface into a thickness of the substrate and laterally along the substrate;
• A recess extending through the substrate transversely with respect to, and opening at, the first surface proximate to the first and second adjacent cavities;
• body that is movable within the recess and having a distal end that is movable:
• (i) from a first position at which the distal end is within the recess and not extending out of the opening of the recess, (ii) toward the first surface of the substrate, and (iii) to a second position at which the distal end is extending out of the opening of the recess;
• A flexible cover overlying at least a portion of the first surface of the substrate, the first and second cavities, the recess, and the distal end of the body,
• Wherein:
• (i) the cover prevents a fluid connection between the first and second cavities when the body is in the first position, and (ii) the distal end of the body distorts the cover by expansion and/or with partial bulging or detachment and causes the cover to move away from the first surface of the substrate in the vicinity of the first and second cavities when the body is in the second position, thereby creating a fluid connection between the first and second cavities between the substrate and the cover.