the connection between the brain and the nerves wich messages travel
No, but a peripheral nerve does.
nerve chord
Chordata
It runs along the dorsal side of the body.
Brain, Nerves, Spinal Chord
Axillary nerve C5 and C6, a branch of the posterior chord of the brachial plexus
Earthworm is an invertebrate hence it has its nerve chord at the "front" of its body, that is at the ventral surface.To avoid causing damage to the nerve chord,earthworm(invertebrate)is dissected dorsal side up.
Yes, all chordates have a nerve chord running down their back and an earthworm has a nerve chord running down it's back therefore it is a chordate
it protects a hollow nerve chord
Yes , it is mostly annelid character .
Yes, they have a dorsal (at the back) nerve chord as they are vertebrates ( they have an internal skeleton).
all chordates have notochord, gill slits, postanal tail, and nerve chord.