the range of 200 to 1000 magnifications as a honeycomb structure consisting of a plurality of rows of irregular hexagons each having a transverse x axis a longitudinal y axis and a z axis which defines a height of each microwell co parallel major bases define the directionality of anticipated cell growth while pairs of equilateral minor bases define the x axis width of each microwell an arrow like geometry is defined by the equilateral pairs of minor bases which also define an x axis separation between opposing major bases of the hexagon to induce cell growth directionality an acute angle exists between the members of the arrow like pairs of minor bases while an obtuse angle exists between contiguous major and minor bases application_number US 33807603 A description with reference to the perspective view of fig1 which represents an enlargement of about 1000 magnifications of the inventive bio reactive cell culture surface 10 the same is characterized in terms of an x y z cartesian coordinate system in which the x axis represents the width of the bioreactor the y axis the length thereof the z axis the height of walls 12 thereof the area of each microwell 116 is a function of the x and y dimensions thereof as is shown in the.