Sagittal Section Human Head

A

nasopharynx, passes air from nasal cavity to oropharynx

B

oropharynx, passes air from nasopharynx to laryngopharynx

C

laryngopharynx, passes air from oropharynx to larynx

21

epiglottis, guards airway by closing larynx during swallowing

25

Isthmus of fauces, passageway b/w oral cavity and pharynx

15

hyoid bone, protects larynx

16

thyroid cartilage, protects larynx

17

cricoid cartilage, protects larynx

22A

vestibular folds, protect airway by helping close larynx during swallowing

22

vocal chords, speech

23

glottis, air passageway inside larynx

24

trachea, passes air from larynx to primary bronchi

26

esophagus, passes food from pharynx to stomach

18

frontal sinus, warms and humidifies air

19

sphenoid sinus, warms and humidifies air

27

superior nasal concha, increases turbulence of inhaled air

28

middle nasal concha, increases turbulence of inhaled air

29

inferior nasal concha, increases turbulence of inhaled air

vertical arrow b/w 29 and 30

internal nares, pass air from nasal cavity to nasopharynx

30

pharyngotympanic tube opening, equalizes pressure b/w middle ear and pharynx

31

pharyngeal tonsils, immune response against pathogens

13

hard palate, separates oral and nasal cavities

14

soft palate, protects nasal cavity during swallowing

20

tongue, manipulates and mixes food with saliva

32

uvula, protects nasal cavity during swallowing