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leg
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   Also found in: Medical, Financial, Encyclopedia, Wikipedia 0.06 sec.

leg

Generally, the whole of the hind limb; anatomically the portion between the knee and the ankle. The anatomy of the hind limb is similar in all mammals. The thigh has one main bone, the femur, which also forms part of the hip joint and the knee joint. The leg proper contains two bones, the larger tibia (shin bone) and the smaller fibula. The upper part of the tibia forms, with the lower part of the femur, and with the patella (knee-cap), the knee joint; but both tibia and fibula enter into the formation of the ankle joint. The main difference in structure of the hind limb in mammals compared with lower vertebrates is that in the course of evolution it has rotated inwards. The main arterial blood supply of the leg is from the common femoral artery; the main nerve supply is the great sciatic nerve and its branches.



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For example, regular stair-climbing sessions improve endurance and strengthen leg muscles at the same time.
The increased number of leg muscle capillaries, a higher density of oxygen processing mitochondria, more red blood cells, and other gradual cardiovascular changes will lay the groundwork for the strength that will sustain you over the long haul of your entire running career.
The researchers then removed a tissue sample from a leg muscle in each volunteer and grew the cells for several weeks in the lab.
 
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