This diagram shows the various parts seen
when one views the bottom of the horse's foot. They include the heel, quarter,
and toe segments. The frog is located between the heels, forming a "V"
into the centre of the sole. The frog is differentiated from the sole of the foot
by two lines called commissures. The hoof wall is thicker at the toe than at the
quarter and heel. The hoof wall is separated from the sole by the white line.