I'm no scientist but I would say that we do have a complex nervous system.
Learn more at:
http://en.m.wikipedia.org/wiki/Nervous_system
The solarplexus is the nerve complex at the pit of the stomach.
Advances in Complex Systems was created in 1998.
Bees do not hurt unless pain has been inflicted on them. However they don't have complex nerve systems like humans have so I imagine bees don't hurt as much as we do.
Adobe Systems headquarters complex was created in 1996.
nerve chord
nerve plexus
I am pretty sure they have simple but very complex digestive systems
New England Complex Systems Institute was created in 1996.
Echinoderms have the simplest nerve and muscle structures among the options given. They have a decentralized nerve net and tube feet with muscles that help in locomotion and feeding. Arthropods, Crustaceans, Vertebrates, and Mollusks have more complex nerve and muscle systems with centralized nerves and specialized muscle fibers.
Complex adaptive systems are systems that change and restructure themselves based on changes in their environment. These types of systems can range from ant colonies to global economy investments. Perhaps one of the best examples of complex adaptive systems is the internet.
A cnidarians nervous systems Is a simple nerve net A cnidarians nervous systems Is a simple nerve net
The vagus nerve (cranial nerve X) is the most important nerve for swallowing. It innervates the muscles involved in the swallowing process and helps coordinate the complex sequence of muscle movements required for safe and effective swallowing.