Imagine two solid rods that are interconnected at various points and at there point of connection are present the ganglia.

plz explain it in more detail

i m not getting it clear

Alisha in non chordates normally we can see ventral double solid nervous system means they have ventral(at lower part), double --2 rod like structure and are solid in nature.. In chordates a single dorsal(upper) hollow(tube like) structure is present... If u are satisfied with this answer I am happy

And u pls reply also 😘