The first picture is the cerebellar cortex. The cerebellar cortex is divided into three layers. At the bottom lies the thick granular layer, densely packed with granule cells, along with interneurons, mainly Golgi cells but also including Lugaro cells and unipolar brush cells. In the middle lies the Purkinje layer, a narrow zone that contains the cell bodies of Purkinje cells and Bergmann glial cells. At the top lies the molecular layer, which contains the flattened dendritic trees of Purkinje cells, along with the huge array of parallel fibers penetrating the Purkinje cell dendritic trees at right angles.

The second picture is the cerebral cortex. The different cell types that constitute the gray matter of the cerebral cortex are distributed in six layers, with one or more cell types predominant in each layer. Although there are variations in the arrangement of cells in different parts of the cerebral cortex, distinct layers are recognized in most regions. Horizontal and radial axons associated with neuronal cells in different layers give the cerebral cortex a laminated appearance

The third picture is the spinal cord tissue. A small section of the white matter and the gray matter of the anterior horn of the spinal cord are
illustrated at a higher magnification. The gray matter of the anterior horn contains large, multi-polar motor neurons (2, 3). These are characterized by numerous dendrites (5, 6) that extend in different directions from the perikaryon (cell bodies). In some sections of the neurons, the nucleus (8) is visible with its prominent nucleolus (8). In other neurons, the plane of section has missed the nucleus and the perikaryon appears empty (2). Located in the vicinity of the motor neurons are the small, light-staining, supportive cells, the neuroglia (7)

Source: diFIORE’S ATLAS OF HISTOLOGY WITH FUNCTIONAL CORRELATIONS by Victor P. Eroschenko, PhD