Function Breathing Provide oxygen to

the body Inhalation

Remove carbon dioxide from the body Exhalation

Parts Nose Pharynx Epiglottis Larynx Trachea Lungs

Bronchi Bronchioles Alveoli

Nose Nostrils (nares)

Opening to the nasal cavity.

Lined w/ mucosa Septum

Cartilage that divides nasal cavity into R / L

Cilia Nasal hair Filters air

Pharynx (fair – inks)

Aka Throat 3 divisions

Nasopharynx Oropharynx Laryngopharynx

Double function Breathing Swallowing Connects nasal

cavity to the trachea

Epiglottis Flap of cartilage

tissue Covers the

esophagus while breathing

Covers the trachea and larynx while swallowing

Larynx (Lair – inks)

Voice box Vocal cords

Bands of tissue create the sound of your voice

Laryngitis Inflammation of the

vocal cords

Adam’s apple Cartilage that

surrounds the voice box Aka Thyroid cartilage

Trachea Aka ‘windpipe’

Breathing tube Connects the

larynx to the lungs Held open by ‘C’

shaped cartilage rings

Tracheotomy ER breathing hole

Bronchi 2 divisions off of

the trachea Main breathing

tube to each lung R / L bronchus Divides into smaller

air tubes called Bronchioles

Bronchioles Smaller branches

off of the bronchi Connects bronchi

to the alveoli Alveoli

‘grape like’ clusters

Form ‘air sacs’ Gas exchange takes

place here.

Lungs 2 cone shaped

organs Exchange gases

Pleura Membrane that

surrounds each lung Contains pleural fluid

Reduces friction while breathing

In dentistry the respiratory system relates to cross contamination (inhalation), hyperventilation, vital signs and administration of medications (N2O).

You are the ‘expert’….you should know more than your patients…..

Any questions….????