Structure of the optimal rectangular microcirculatory cell of a leaf is investigated
on the model of liquid motion through the bifurcating tubes with permeable walls and its
filtration into the cell filled with anisotropic porous biological medium. The relation between
the diameters of the tubes in the bifurcation as well as coordinates of the bifurcation point at
given width and length of the cell which provides minimum total energy consumptions are
obtained
