Conversation so far:
where is the nerve cord located in an insect
Insects have a nerve cord which runs along the length of their body.
what does the nerve cord of insects consist of
The ventral nerve cord consists of a brain, a part underneath the brain called the sub-esophageal ganglion, and a cord that runs along the length of their body.
how is an insect's ventral nerve cord different from a spinal cord
The ventral nerve cord is similar to our spinal cord except that it runs down the front of their body instead of the back.
what does the ventral nerve cord look like
The ventral nerve cord looks a little like a string of beads.

Question: what are the beads
Self-contained rewrite: what are the beads on an insect's ventral nerve cord