Respiratory System Flashcards
Nose
external nares (nostrils)
Nasal cavity
filters, warms, moistens incoming air; passageway to pharynx
Paranasal sinuses
produce mucus; act as resonators for sound; lighten skull
Nasal Conchae
bony prominences that provide space for nasal meatuses through which incoming air is warmed and humidified.
Pharynx
chamber shared by the digestive and respiratory system; passageway for air between nose and larynx and for food from mouth to esophagus
Larynx
(voice box) inferior to hyoid bone and superior to trachea. Cartilaginous structure surrounding glottis and vocal cords; passageway for air between pharynx and rest of respiratory tract; produces sound; protects trachea from foreign objects.
Thyroid cartilage
largest laryngeal cartilage (commonly called Adam’s Apple)
Cricoid cartilage
(krikos; ring) laryngeal cartilage inferior to thyroid cartilage
Glottis
passageway from pharynx to the larynx
Epiglottis
(epi- ; above) (glotta; tongue) composed of elastic cartilage, the epiglottis folds back over the glottis, during swallowing to prevent entry of food or liquids into the respiratory passageways
Trachea
windpipe passageway for air to and from thoracic cavity; traps and expels foreign matter
Diaphragm
muscle separating thoracic cavity from abdominopelvic cavity enlarges thoracic cavity to allow for inspiration, returns to original position for expiration
Bronchus (pl. Bronchi)
passageways for air to and from lungs; filter air
Bronchioles
passageways for air to and from alveoli
Alveoli
site of gas exchange; functional units of lungs