This section from
the mouse brain shows a portion of the gray matter. A row of pyramidal
cell bodies, with their characteristic triangular shape, are located
along the left-hand side of the image. The long extension extending from each
perikaryon towards the right points to the surface of the cerebrum and gives
rise to the cell's dendritic tree. The many nuclei in the section belong either
to glia cells or to smaller
neurons. The "holes" in the section, ranging from circular
to elongated, mark the location of blood vessels.