Esophagus Anatomy Sphincters Arteries Veins Nerves 48 OFF Biology Diagrams

Esophagus Anatomy Sphincters Arteries Veins Nerves 48 OFF Biology Diagrams This article describes the anatomy of the esophagus. Click here to learn more about its sphincters, arteries, veins, and nerves at Kenhub!

How does the esophagus work? At the opening of your upper esophagus, there's a ring-shaped muscle called the upper esophageal sphincter. Your upper esophageal sphincter senses when food or liquid is coming toward it. When it gets the signal, the sphincter relaxes or opens so that food can enter your esophagus. Lower esophageal sphincter Distal 2-4 cm esophageal high pressure zone defined by manometry. Corresponds to vestibule on esophagram. Prevents gastroesophageal reflux. Drugs and many types of food and drink affect lower esophageal sphincter and can lead to reflux. Glucagon relaxes the lower esophageal sphincter when used for air-contrast upper gastrointestinal examination. The tubular esophagus

The upper esophageal sphincter: anatomy and physiology Biology Diagrams

The upper esophageal sphincter (UES) is a high-pressure zone at the transition of the pharynx and the cervical esophagus. The lower esophageal sphincter (LES) is a high-pressure zone located where the esophagus meets the stomach and protects the esophagus from the reflux of gastric contents.

The lower esophageal sphincter is a valve between your esophagus and stomach. It prevents stomach contents from going back up the esophagus.

Lower Esophageal Sphincter: Anatomy, Function, Treatment Biology Diagrams

Esophagus: Anatomy & Physiology Anatomy Layers Mucosa (Squamous Epithelium) Submucosa Muscularis Propria (Longitudinal) Upper 1/3: Striated Lower 2/3: Smooth No Serosa Importance: CA Spreads Through Lymphatics Sphincters Upper Esophageal Sphincter (UES) Cricopharyngeus Muscle 15 cm From Incisors Most Common Site of Iatrogenic Perforation and Foreign Body Prevents Air Swallowing Innervation