This engaging program explains the level of organization necessary for the structure and functioning of multicellular organisms, including cells, tissues, organs, and organ systems. Focusing on the nervous system of multicellular organisms, the video features dissections of a cane toad and a worm to illustrate the different forms and functions of both vertebrate and invertebrate nervous systems.

Encoded with permission for digital streaming by Infobase on October 22, 2012. Learn360 is distributed by Infobase for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware.

Building Blocks of Organisms (2:23) -- From Cell to Organism (4:36) -- The Nervous System (4:05) -- Vertebrate Nervous Systems (4:29) -- Invertebrate Nervous Systems (4:46) -- Credits: Multicellular Organisms and Their Nervous Systems (0:41).