The classic anatomical position is the body standing erect, faciing straight ahead.

The front of the body is called anterior or ventral.

The back part of the body is considered posterior, or dorsal.

Something that is above something else or towards the top of the body is called superior, or cranial on the body.

Inferior, or caudial means more towards the bottom of the body.

The area closer to the midline of the body is called medial, and as it gets further away lateral.

Proximial is as you get closer to the trunk, and sital is as you get further away from the trunk.