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nasal cavity

nasal septum

red
hard palate (maxillary bone)

yellow
soft palate (muscles)

green
nasopharynx

entire colored region
pharynx

blue
nasopharynx

green
oropharynx

purple
laryngopharynx

larynx

green
thyroid cartilage

red
cricoid cartilage

blue
hyoid bone

upper tan part
epiglottis

yellow
vocal folds

red
vestibular folds

whats the open space in the middle of the colored region ?
glottis
whats the function of the larynx ?
maintains open airway
produces sound
prevents food from entering airway

trachea

tracheal rings (hyaline cartilage)

carina. point of tracheal bifurcation
what is the trachea lined with?
pseudostratified ciliated columnar epithelium
function of trachea
conducts air to bronchi
cilia move debris upward

primary (main) bronchi

secondary (lobar) bronchi

tertiary (segmental) bronchi

green
right lung superior lobe

yellow
right lung middle lobe

red
right lung inferior lobe

blue
left lung superior lobe

purple
left lung inferior lobe

right lung horizontal fissure

right lung oblique fissure

left lung oblique fissure

left lung cardiac notch

alveoli

alveolar ducts
what are alveoli lined with ?
simple squamous epithelium

alveoli histology

lung histology

red
parietal pleura. lines thoracic cavity

green
visceral pleura. covers lungs

yellow
pleural cavity

diaphragm
trace of airflow
nasal cavity
pharynx
larynx
trachea
bronchi
lungs
alveoli

yellow outline
mediastinum

blue outline
pleural cavities

hilum