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In biology, a leg is the part of an animal's body (most commonly in one of the even numbers of 2, 4, 6 or 8, and many more in millipedes) that separates the body from the ground and is used for locomotion.

In an extended sense, a leg is any part of an object that supports it off the ground. An example is the legs of a table or a chair.

Strictly speaking, in human anatomy, the leg only includes everything between the knee and the foot, and is a part of the lower limb.

Table of contents
1 Bones of the human leg (from hip joint to ankle joint):
2 Muscles of the human leg:
3 Vasculature of the leg

Bones of the human leg (from hip joint to ankle joint):

Muscles of the human leg:

Muscles of the thigh
Anterior compartment of the thigh
  • Quadriceps femoris, which is composed of:
    • Vastus lateralis
Vastus medialis
Vastus intermedius
Rectus femoris
Adductor longus
Adductor brevis
Adductor magnus
Gluteus maximus
Tensor fascia lata
Posterior compartment of the thigh
  • Biceps femoris

Muscles of the calf
  • Popliteus
The anterior compartment
Extensor digitorum longus
Extensor hallicus longus
Peroneus tertius
The posterior compartment
The lateral compartment
Peronius brevis
The deep posterior compartment
  • Tibialis posterior
Flexor digitorum longus
Flexor hallicus longus

Vasculature of the leg

The arteries
Common femoral artery
Deep femoral artery
Superficial femoral artery
Popliteal artery
Anterior tibial artery
Posterior tibial artery
Peroneal artery
Arcuate artery
The veins
Greater saphenous vein
Lesser saphenous vein
Femoral vein
Popliteal vein
Anterior tibial vein
Posterior tibial vein
Peroneal vein