Ventral nerve cord of earthworm
Arises from anterior part of pharyngeal ganglia
Runs posteriorly up to last segment
Nerve cord are two in number and they are free.
Arises from 8th segment.
As we learned
Ventral Nerve Cord -
Arises from the posterior part of sub-pharyngeal ganglia (from 5th segment) and runs posteriorly up to last segment
- wherein
Nerve cord two in number, but they are fused together so called double.