Directional Terms
Planes and Surfaces
Functional Components
Respiration
100

Near the head

Rostral

100

Divides the body into front and back portions, like slices of bread

Coronal

100

The driving force for speech/voice

Respiratory mechanism

100

The process of moving gases into and out of the lungs

Ventilation

200

Near the tail

Caudal

200

Divides the body into left and right portions

Sagittal

200

Regulates resonance

Velum and pharynx

200

Exchange of gases

Respiration

300

The point farthest away

Distal

300

Divides the body into upper and lower portions

Horizonal or transverse

300

Source of phonation

Laryngeal mechanism

300

Also known as the windpipe

Trachea

400

The point closest to the truck

Proximal

400

The bottom in quadrupeds or the front in bipeds

Ventral

400

Mobile articulators

Tongue, lips, jaw

400

Major muscle of inspiration which divides the thorax and the abdomen

Diaphragm

500

The opposite of superficial

Deep

500

The back or upper side

Dorsal

500

Conveys meaning through intonation

Prosody

500

Posterior, bony support structure of the thorax

Vertebral column