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In general, a leg is any of the parts of an animal's body that support the rest of the body above the ground, and are used for locomotion. Anatomists often use "leg" to refer to the portion from the knee down, and use "thigh" for the knee up.

Legs mostly come in even-numbered quantities that are characteristic of some taxonomic groups:

  • in vertebrates, 2 (the bipeds) or 4 (the quadrupeds);
  • in many familiar arthropods, 6, 8, or 12;
  • in some arthropods, more than a dozen and sometimes over 100 -- but despite what their names might suggest,
    • centipedes seldom have exactly a hundred, and
    • millipedes apparently never even approach a thousand.

In most quadrupeds and bipeds, legs consist of two main parts, attached to the body at one end, and to the foot at the other, and jointed at the knee.

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Brian_Samurai (Brian Manyapetsa) Thu, 09 Feb 2012 06:13:51 -0000
In the middle of the bedroom, the kitchen or the highway. There's gon' be a lotta leg room, and a lil bit'a foreplay.
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