Is There a Nervous System in a Complex Organism?

I think that we've had cognition even before the neura plate becomes adistinguishable. Once you have a complex organism, and it has so many different e component needs er to have some sort of metahomeasthetic mechanism. But i don't think that every creature with the nervous system is conscious. I would also say that because the foetus is in er imbedded withine body of its mother, Its needs ar pretty much met for it. So i think that at this stage, the problems of pretty automatically met er. And i think that consciousness t once we start getting to consciousness, en its once outside of that kind of er problem space.