Dorsal View of a Rat Brain

The brain on the left is still enclosed in the protective layes of connective tissue know as meninges. There are three layers of meninges. The inner two are filled with fluid that helps cushion the brain. The meninges have been removed from the brain on the right. This makes it easier to see the convolutions. The small olfactory bulbs are oriented toward the top of the image, followed by the paired cerebral hemispheres, a medial vermis with two lateral cerebellar hemispheres, below which the medulla oblongata grades into the spinal cord. Back