Name the numbered structures:

1 : Lateral gray horn

2 : Dorsal gray horn

3 : Anterior median fissure

4 : Central canal

If this is a thoracic segment, what cell bodies are located in #1 ?

Sympathetic motor nuclei

What is located within area 4. Where else in the spinal cord is this 'stuff' located ?

Cerebro spinal fluid. Also located in the subarachnoid space.

In what area of the spinal cord does the 'stuff' in 4 meet up with the rest ?

Distally, the cerebrospinal fluid in central canal meets up with the subarachnoid space at the conus medullaris.