“Ctenophores present a nervous system which is very similar to that found in Cnidaria, the other phylum that is composed of animals with radial symmetry. This nervous system is organized mainly as a nervous network, in which each neuron is connected to many others in a seemingly random fashion. No central control is found here; the nervous systems of radial animals are the best example, in nature, of a diffuse nervous system. Two interconnected networks, one in the epidermis and one at the basis of the gastrodermis, are found. The axons from the neurons in this network terminate either in other neurons, or in junctions with sensorial or effector organs.”via“And through strange aeons, even Death may die” – The Descent of Brain Blog | Nature Publishing Group.