A resident who is lying on her left side with her upper knee flexed and raised toward the chest is in the ______ position.

The position described is known as the Sim's position. In this position, a person is typically lying on their left side with the upper knee bent and brought towards the chest, which allows for better access to the rectal area or facilitates certain medical examinations and procedures. This positioning helps to create a more comfortable and open posture for both the resident and healthcare providers during assessments or interventions.

Understanding the specifics of body positioning is crucial in healthcare settings, particularly for comfort, safety, and clinical procedures. The Sim's position is especially relevant for various nursing tasks, such as administering enemas or assessing rectal temperatures, where a clear line of access is necessary.