dysphagia medical poster

dysphagia swallow esophagus food anatomy epiglottis trachea throat larynx cavity scheme vector mouth human nose nasal medical upper digestive tongue gastrointestinal system digestion regurgitation peristalsis pain eating esophageal endoscopy illustration cancer infographic stomach sphincter block swallowing difficult problem liquid painful narrowing paraesophageal oropharyngeal esophagogastric gastric graphic inability poster squeezed vomiting