lower cardiac esophageal sphincter. infographics. on black background.

abdomen anatomical anatomy biology body bolus cavity cross deglutition diagnosis diaphragm digestion digestive drawing dysphagia eating education esophageal esophagus food gastric gastritis health healthcare human illustration larynx mechanism medical medicine mouth nutrition oesophagus organ pharynx physiology pyloric pylorus science section sphincter stomach swallow swallowing system tongue trachea tract upper vector