Provided is a liquid stirring apparatus capable of stirring liquid in a wide range. A liquid stirring apparatus 100 includes a first rotating blade 110 and a second rotating blade 130 connected to a liquid discharge device 101 including a submersible pump. The first rotating blade 110 and the second rotating blade 130 include arm tubes 114 and 134 respectively extending radially outward of a first base tube 111 and a second base tube 131, and include arm tubes 115 and 135 respectively extending radially outward from intermediate tubes 113 and 133. The arm tubes 114 and 134 and the arm tubes 115 and 135 are connected to each other by connecting bodies 116 and 136 so that liquid WK can flow therethrough. The connecting bodies 116 and 136 are attached with flat plate-shaped stirring plates 117 and 137 that extend radially outward of the connecting bodies 116 and 136.

A microfluidic device and a system comprising such a microfluidic device or chip and a method for mixing and distributing fluids using said chip or system, wherein the microfluidic device for mixing and distributing fluids, formed by bonding of a first substrate and a second substrate, wherein open formations on bonded the first and second substrate form at least part of a microfluidic channel network comprising at least one microstructure comprising a single receiving chamber which is connected by at least one first channel extending from said single receiving chamber leading into an at least first target chamber, wherein the at least one first channel extends clockwise or counter clockwise from the single receiving chamber and is bowed in a clockwise or counter clockwise direction.

Provided is a liquid stirring apparatus capable of stirring liquid in a wide range. A liquid stirring apparatus 100 includes a first rotating blade 110 and a second rotating blade 130 connected to a liquid discharge device 101 including a submersible pump. The first rotating blade 110 and the second rotating blade 130 include arm tubes 114 and 134 respectively extending radially outward of a first base tube 111 and a second base tube 131, and include arm tubes 115 and 135 respectively extending radially outward from intermediate tubes 113 and 133. The arm tubes 114 and 134 and the arm tubes 115 and 135 are connected to each other by connecting bodies 116 and 136 so that liquid WK can flow therethrough. The connecting bodies 116 and 136 are attached with flat plate-shaped stirring plates 117 and 137 that extend radially outward of the connecting bodies 116 and 136.