Bio 182

Towards the front or head end of the body

Towards the rear or tail end of the body

The back or top part of the body

Belly or lower part of the body

towards the cranium or head

Towards the tail

Sides of the organism

Refers to the part of the appendage or any structure that is closer to the body's midline. 

The knee is proximal relative to the foot.

Refers to the part of an appendage or any structure that is more distant from the body's midline. 

The foot is distal relative to the knee.

At the surface of a structure. 

The skin is superficial to the muscles.

More removed from the body's surface. 

The muscles are deep relative to the skin.