All bows have these three basic parts: 

Grip

The grip allows the hunter to hold the bow in a vertical position while shooting. The proper way to grip for bows with a wrist strap is with a relaxed handgrip. For other kinds of bows, fingertips are curled and rest lightly on the front of the grip. The force of the bow, at full draw, holds the grip in the palm of the archer's hand. If the archer grips the bow too tightly, this tends to throw the arrow left or right or up and down.

Limbs

The limbs are the upper or lower parts of the bow that bends when the string is drawn back. They store energy when the bow is held at full draw. Never release a bow string without an arrow nocked in place. This is called "dry firing" a bow. Doing so can cause serious damage to the bow and/or injury to the shooter and bystanders.

String groove

Found on the limb tip of longbows and recurve bows, the string groove keeps the bow string in place.