Cranium

The cranium, also known as your brain, is the center of the nervous system in all vertebrate and most invertebrate animals.

The Shape of the cranium

The shape and size of the brains of different species vary greatly, and identifying common features is often difficult. Nevertheless, there are a number of principles of brain architecture that apply across a wide range of species. Some parts of brain structure are common to almost the entire range of animals species; others differ "advanced" brains from more simple ones, or distinguish vertebrates from invertebrates.