Passive microfluidic valves

A passive microfluidic valve comprising:

• a first manifold portion including:
• a first chamber;
• a first inlet fluidly coupled to the first chamber;
• and
• a second inlet;
• a second manifold portion in fluid communication with the first chamber via a channel, the second manifold portion including a second chamber fluidly coupled to the first chamber and the second inlet;
• and
• a flexible membrane disposed between the first manifold portion and the second manifold portion and separating the first chamber and the second chamber, the flexible membrane configured to:
• limit a flow rate of a media flow in a first direction, in which media flows from the first inlet to the second inlet, in response to pressure of the media flow;
• and
• at least one of limit the flow rate of the media or block flow of the media in a second direction, in which the media flows from the second inlet to the first inlet, in response to pressure of the media flow.