An anatomical opening is a term used to describe any opening in the body, such as the mouth, nose, ears, and eyes. It can also refer to openings in the digestive, respiratory, and reproductive systems. The most common anatomical opening is an ORIFICE, which is an opening that allows for the passage of air, liquids, or solids. Orifices are typically found in the digestive tract, urinary tract, and reproductive organs.