Chordata - Brains are only well developed in Vertabrates but in other chordata the anterior end of the main nerve chord is enlarged to at least form the suggestion of a brain. Chordata species all have spinal cords. Vertebrates all have central nervous systems and a well developed brain, in fact probably the most well developed out of all species and organisms.
Crocodilia -relatively small brains, The scaly looking skin that they have featured lots of pores all over it. They have sensory elements that help them to identify what is around them in any given environment
Human - The Human nervous system is comprised of two parts the Central Nervous system and the Peripheral nervous system. The Central nervous system contains the Brain and the spinal cord. The nerves are cells which have nucleuses and react to messages and send the messages.
Ensatina salamander - The salamander nervous system consists of a brain, spinal cord (dorsal nerve cord), and optic nerves in the head. The brain helps receive and perform messages. The optic nerves are for sight to see its surroundings and things going on around it in order for its brain to be able to react.
Crocodilia -relatively small brains, The scaly looking skin that they have featured lots of pores all over it. They have sensory elements that help them to identify what is around them in any given environment
Human - The Human nervous system is comprised of two parts the Central Nervous system and the Peripheral nervous system. The Central nervous system contains the Brain and the spinal cord. The nerves are cells which have nucleuses and react to messages and send the messages.
Ensatina salamander - The salamander nervous system consists of a brain, spinal cord (dorsal nerve cord), and optic nerves in the head. The brain helps receive and perform messages. The optic nerves are for sight to see its surroundings and things going on around it in order for its brain to be able to react.