In the context of anatomy and physiology, "deep" refers to structures that are further away from the surface of the body or farther into the body. It contrasts with superficial structures, which are closer to the body's exterior.
Related terms
Superficial: Pertaining to or located near the surface of the body.
Anatomical position: A standardized stance in anatomy where the body stands upright with feet together, arms at the side, and head, eyes, and palms facing forward, used as a reference point for anatomical nomenclature.
Planes of the body: Imaginary lines dividing the body into sections (sagittal, frontal/coronal, transverse) to describe locations or directions of movements