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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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Has landed in memphis. Final leg of the new years road trip... and the chance of snow tomorrow, from what i hear. Blizzard 2010!
littledylan935 (Little Dylan) Wed, 06 Jan 2010 02:09:32 -0000
Has landed in memphis. Final leg of the new years road trip... and the chance of snow tomorrow, from what i hear. Blizzard 2010!
@MZKEKE615 Here's an example: today we did 300 jumping jacks, 100 push ups, 100 sit ups, 100 leg lifts, 100 squats, stretching. Warm up!
TaoDiva (Ana Sanabria) Wed, 06 Jan 2010 02:09:26 -0000
@MZKEKE615 Here's an example: today we did 300 jumping jacks, 100 push ups, 100 sit ups, 100 leg lifts, 100 squats, stretching. Warm up!
Oh how I LOVE a good snow crab leg dinner out with the girls!!
walcottm (Marcie Walcott) Wed, 06 Jan 2010 02:09:19 -0000
Oh how I LOVE a good snow crab leg dinner out with the girls!!
pitching time :p leg is killin me!!!!
AmandaTNB (Amanda Eshelman) Wed, 06 Jan 2010 02:09:12 -0000
pitching time :p leg is killin me!!!!
Uuuugggggghhhhhh my leg is sleep! I been layin thisz way on my bed way too long! So painful!
PurpleDiiva88 (Mya ) Wed, 06 Jan 2010 02:08:50 -0000
Uuuugggggghhhhhh my leg is sleep! I been layin thisz way on my bed way too long! So painful!
@JhonenV The chicken or the leg? I'm just saying, you could have some sick curious friends who'd take advantage of a situation like that.
templesmith (Ben Templesmith) Wed, 06 Jan 2010 02:08:49 -0000
@JhonenV The chicken or the leg? I'm just saying, you could have some sick curious friends who'd take advantage of a situation like that.

 
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Leg Cramps - An informational monograph on for patient counseling.
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Leg Pain - Resources from the National Library of Medicine.

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Police Brutality: Legless in Wheelchair Tasered and Exposed
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