(a)   (cranial): toward the head or upper part of a structure of the body; above.

(a)   (caudal): away from the head end or lower part of a structure of the body; below.

(a)   (anterior): toward the front part of the body; in front of.

(a)   (posterior): toward the back part of the body; behind.

(a)   toward the midline of the body; the inner side of.

(a)   toward the outside of the body; the outside of.

(a)   Toward one side

(a)   Toward both sides

(a)   closer to the origin of the body part or the point of attachment of the limb to the body trunk.

(a)   farther from the origin of the body part or the point of attachment of the limb to the body trunk.

(a)   (external) toward or at the body surface.

(a)   (internal) away from the body surface, inside.

(a)   (coronal) plane. Divides the body into two halves, the front and the back.

(a)   plane. Divides the body into equal halves, the left and the right.

(a)   plane. A medial plane that divides the body, not equally into left and right planes.

(a)   plane. Divides the body into equal halves, top (superior) and bottom (inferior).