1. A biological image presentation device comprising: an acquisition unit acquiring, at multiple positions on an axis as a standard of a biological region, images of sections orthogonal to the axis; a determination unit determining an image as a standard and an image for comparison with the image as a standard from among a plurality of images acquired by the acquisition unit; a feature point extraction unit extracting, from the image as a standard, a plurality of feature point positions where a change of luminance value between neighboring image pixels in the same image as a standard equal to or larger than a defined value is present; a detection unit detecting corresponding feature point positions in the image for comparison corresponding to the feature point positions in the image as a standard extracted by the extraction unit; a division unit dividing the image as a standard into a plurality of divided areas having triangular shapes on the basis of the feature point positions in the image as a standard extracted by the extraction unit, the shapes of each of the divided areas being defined by a plurality of adjacent feature point positions in the image as a standard, wherein at least one feature point position extracted from the image as a standard is deleted based on a similarity of a corresponding feature point position detected in the image for comparison being lower than a set value, wherein the division unit divides the image as a standard independent of the at least one extracted and deleted feature point position in the image as a standard; a mapping unit mapping the image for comparison to triangular comparison areas corresponding to each of the triangular divided areas of the image as a standard while modifying the triangular shapes of the comparison areas of the image for comparison so as to conform to the triangular shapes of the divided areas of the image as a standard, thereby reducing any overall shape distortion between the image as a standard and the image for comparison; and a display control unit switching and displaying an image for display in a display area by using the image as a standard and an image mapped by the mapping unit; and a display unit division unit dividing the image as a standard and the image mapped by the mapping unit into display unit blocks, wherein the acquisition unit acquires enlarged images of tissue slices sliced at multiple positions in the depth direction of a tissue excised from the biological region, wherein, when the image for display in the display image is displayed, the display control unit predicts the next image for display in accordance with the current image, stores the display unit blocks of the predicted image in a buffer memory, reads the display unit blocks of the same portions of the next image for display in the display area as the predicted image, m the buffer memory, and reads the display unit blocks of portions different from the predicted image from a storage unit, and wherein the display unit division unit generates the image as a standard and the image mapped by the mapping unit as images corresponding to a plurality of levels of resolution, and divides the image corresponding to each level of resolution into the display unit block.