Light micrograph of a spinal sensory ganglion, which is also known as a dorsal root ganglion. The ganglion is formed of a cluster of nerve cell bodies each with a central nucleus and densely stained cytoplasm (purple). They are surrounded by many small satellite or glial cells. Sensory signals from peripheral organs travel via nerves towards the spinal cord and pass through the ganglion before entering the grey matter (dorsal horn) of the spinal cord. At top is the connective tissue (light blue) capsule that surrounds the ganglion. Magnification x200 when printed at 15cm wide.