(1) A person who intentionally causes a wound to another is liable on conviction on indictment to imprisonment for 10 years or on summary conviction for 3 years.
(2) A person who recklessly causes a wound to another is liable on conviction on indictment to imprisonment for 5 years.
(3) In this section “wound” means any incision or puncture which divides or pierces any exterior membrane of the body; and any membrane is exterior, for the purposes of this definition, which can be touched without dividing or piercing any other membrane.