In the spinal cordThe spinal nerves contain sensory and association nervesThe gray matter is internal to the white matterCell bodies are located in tractsThe white matter is internal to the gray matter

It seems like you've made a statement rather than asking a question. However, I can provide some information based on your statement.

1. In the spinal cord: The spinal cord is a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column. It encloses the central canal of the spinal cord that contains cerebrospinal fluid.

2. The spinal nerves contain sensory and association nerves: Spinal nerves are part of the peripheral nervous system. They carry motor, sensory, and autonomic signals between the spinal cord and the body.

3. The gray matter is internal to the white matter: This is not entirely correct. In the brain, the gray matter is on the surface, while the white matter is internal. However, in the spinal cord, the arrangement is reversed - the white matter is on the outside, and the gray matter is on the inside.

4. Cell bodies are located in tracts: This is not entirely correct. Cell bodies of neurons are primarily located in the gray matter of the brain and spinal cord, not in the tracts. Tracts are bundles of axons, which are the long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells.

5. The white matter is internal to the gray matter: As mentioned earlier, this is true for the brain but not for the spinal cord. In the spinal cord, the white matter is external to the gray matter.