The Lower Torso.
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The pelvic girdle is formed by two coxal bones or ossacoxae commonly called hip bones. Together with the sacrum and the coccyx the hip bones form the bony pelvis The lower torso is the lower part of the body containing the pelvis the legs, the thighs, and the feet. The lower limbs carry our total body weight when we are erect. Which means simply that the bones that are supporting us need to be much thicker and stronger than the comparable bones of the upper limb, the bones that support us are the thigh, the leg and the foot.
There are 62 lower extremity bones. They consist of 10 hip and leg, 14 ankle and 38 foot bones.
The leg is technically only the region from the knee to the ankle. It is formed by the fibula on side away from the body ( lateral side) and the tibia, also called the shin bone, on the side nearest the body ( medial side). The tibia connects to the femur to form the knee joint and with the talus, a foot bone, to allow the ankle to flex and extend. The tibia is larger than the fibula because it bears most of the weight, while the fibula serves as an area for muscle attachment