Picture from Encarta
Propagation of a Nerve Impulse Propagation of a Nerve Impulse
Neural Organization Neural Organization
Vertebrate Brains Vertebrate Brains

Neural Organization

Neural Organization
Nervous systems range in complexity from the jellyfish’s network of nerve cells to the central and peripheral systems of humans. Common to many animals is the nervous structure of the earthworm, which consists of a cerebral ganglion, a main nerve cord, and branching pairs of lateral nerves. In some cases, as in insects, the cerebral ganglion acts as a primitive brain, controlling and coordinating various basic functions.
© Microsoft Corporation. All Rights Reserved.
Appears in these articles:
Comparative Anatomy; Anatomy; Nervous System
* Exclusively for MSN Encarta Premium Subscribers. Join Now
Advertisement

Englishtown: Learn English online
Encarta RSS Feeds
© 2008 Microsoft