Gray's Anatomy and International Anatomical Nomenclature Standards

• Anal — Pertaining to the anus, referring to the anus, or located in the immediate vicinity of the terminal orifice of the digestive tract. In an anatomical structural sense, the term qualifies vascular, muscular, nervous, or pathological elements (such as the anal sphincter, anal canal, anal fissure) encountered in human and animal biology, playing a crucial role in excretion control and in proctological medical semiology.