The human foot is composed of many parts, including the HEEL, SOLE, ARCH, instep, toenail, TOE, BALL, and INCH. The HEEL is the back part of the foot, located at the bottom of the ankle. The SOLE is the underside of the foot, which makes contact with the ground when walking. The ARCH is the curved area of the foot, located between the HEEL and the toes. The instep is the top of the foot, located between the toes and the ankle. Toenails are the nails that grow on the toes. The TOE is the end of the foot, located at the front of the foot. The BALL is the rounded area of the foot, located at the base of the toes. The INCH is the area of the foot located between the toes and the ARCH.