Tongue
Pharynx
Glottis
Larynx
Epiglottis
down
Glottis up and closed
Trachea
To lungs To stornach
Esophageal
sphincter
contracted
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Esophageal / sphincter relaxed
Epiglottis
up
Relaxed
muscles
—Relaxed muscles
Glottis down and open
Esophageal
sphincter
contracted
Contracted
muscles