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The human body is asymmetrical. As a result, the left and right foot are not exactly the same size. While these differences are mostly unnoticeable, others may be more obvious. More »

Some causes of a swollen right foot may be an injury, such as a sprained ankle or foot, lymphedema, or infection, according to WebMD. Blood clot and medication side effects are other possible causes of a swollen foot. Sw... More »

Causes of sciatic nerve pain in the legs include lumbar spinal stenosis, degenerative disc disease, spondylolisthesis and pregnancy, according to WebMD. Other causes of pain from the sciatic nerve include being overweigh... More »

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The longest bone in the human body is the femur, which is also called the thigh bone. On average, it is about 20 inches long, according to Infoplease. More »

The loin is located below the rib cage just below the pelvis on the human body, according to Reference.com. Commonly referred to as loins, the loin area of the human body refers specifically to the sides below the ribs t... More »

A tickle is the human body's involuntary response to a foreign stimulus contacting the skin. There is no conclusive evidence to suggest that this response is not present in everyone. More »

The mouth is considered the dirtiest place in the human body. It carries the largest amount of bacteria and germs. More »