Which position describes the body lying face down?

The position that describes the body lying face down is called "prone." This term is commonly used in medical and anatomical contexts to indicate orientation. When a person is in the prone position, their back is facing upward, and they are lying horizontally on their stomach. This position can be important in various clinical assessments or procedures, as it allows for certain examinations or treatments that require the patient to be positioned face down.

The other options refer to different body positions: "supine" means lying on the back, "sitting" indicates a position where the body is upright and supported by the buttocks, and "recumbent" can refer to lying down but does not specify the orientation of the body (it could be either prone or supine). Understanding these terms is essential in healthcare settings, where specific body positioning is relevant for treatment, examination, and documentation.