Nasal fossa (profile): two cavities separated by a vertical plate. Air enters the nasal fossae through the nostrils and flows to an from the lungs.
Olfactory neurson: branch of the nerve related to smell.
Ethmoid bone: a bone at the base of the cranium crossed by divisions of the olfactory nerve.
Sphenoidal sinus: cavity of the sphenoid.
Entrance to Eustachian tube: opening of the tube connecting the middle ear and the pharynx.
soft palate: back part of the palate.
Oral cavity: the chamber of the mouth.
Hard palate: bony front part of the palate.
Upper lip: upper external part of the mouth, covering the teeth.
Nasal cartilage: flexible substance in the point of the nose.
Septal cartilage of nose: flexible substance of the septum.
Skin: organic external covering of the body.
Frontal sinus: cavity in the area of the forehead.