Bug


   |  |
   \__/
-  /  \  -  --- head
 | \__/ |
  \ || /
   /--\
  -|  |-    --- thorax
-/ |  | \-
  --\/--  
 / /  \ \   --- abdomen
|   \/   |

A bug (or insect) is a small creature usually characterized by having no tangible brain, bone, or muscle structure.

Body composition: