dysphagia linear icon. aphagia line pictogram. difficulty in swallowing .

dysphagia deglutition pharyngitis swallow pain disease icon throat gastrointestinal eating mouth symptom heartburn tract patient gastroscopy esophagus food esophageal stomach reflux health anatomy stuck regurgitation sign treatment respiratory vector human elderly inflammation system endoscopy digestive gastric achalasia medical diagnosis gastroesophageal oral swallowing problem difficulty digestion laryngitis tonsillitis medicine painful illness