Bilateral Symmetry



Bilateral symmetry is a type of symmetry in which an animal can be divided into two almost identical portions. Animals with bilateral symmetry have two axes of orientation: front to back and top to bottom. Most mammals (like this squirrel) and arthropods have bilateral symmetry. Animals with bilateral symmetry often have a nervous system that controls intricate movements. Another type of symmetry is radial symmetry, which is common among sessile organisms.


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