Conversation so far:
which part of the cns is made up of the midbrain
The brainstem consists of the medulla, the pons and the midbrain.
what percentage of the brain is the brainstem
The brainstem is a very small component of the brain, making up only around 2.6 percent of the total weight of the brain.
why is the brain stem important
The brainstem is a crucial part of the brain providing the main motor and sensory nerve supply to the face and neck via the cranial nerves.
what is the function of the cranial nerves
Cranial nerves relay information between the brain and parts of the body, primarily to and from regions of the head and neck, including the senses.

Question: which system are the nerves a part of
Self-contained rewrite: which system are the cranial nerves a part of