Human Oesophagus Training Model

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Model Number: NH-43771

Brand: Niche Healthcare

120*120*270

This model, 5X life size, shows the oesophagus in longitudinal section, exposing common pathologies including ulcer (2 types), erosion caused by acid reflux, diverticula, varicosities and oesophageal cancer.

SKU: NH-43771 - VS77480403 Category: Tag:

Description

Categories         Anatomical Model

Subject               Medical Science

Material              Eco-friendly PVC

Application       School/Hospital/Laboratory

 

The oesophagus is a muscular tube that connects the throat (pharynx) to the stomach. It is a key component of the digestive system, responsible for transporting food and liquids from the mouth to the stomach for digestion. Here are the main features and functions of the oesophagus:

Structure

Length and Location:

The oesophagus is approximately 25-30 centimetres (10-12 inches) long in adults.

It begins at the lower end of the pharynx, behind the trachea (windpipe), and extends down through the chest (thoracic cavity) to the stomach, passing through the diaphragm at the oesophageal hiatus.

Layers:

  • Mucosa: The innermost layer, consisting of a mucous membrane that produces mucus to lubricate the oesophagus and facilitate the passage of food.
  • Submucosa: A layer of connective tissue containing blood vessels, nerves, and glands that also produce mucus.
  • Muscularis Externa: This layer contains two layers of muscle: an inner circular layer and an outer longitudinal layer. These muscles are responsible for the peristaltic movements that push food down the oesophagus.
  • Adventitia: The outermost layer of connective tissue that anchors the oesophagus to surrounding structures.

Function

Transport of Food and Liquids:

The primary function of the oesophagus is to move food and liquids from the mouth to the stomach. This process involves coordinated muscle contractions known as peristalsis.

Peristalsis:

Peristalsis is a series of wave-like muscle contractions that propel food down the oesophagus. When food is swallowed, the upper oesophageal sphincter relaxes to allow food to enter the oesophagus. The muscles of the oesophagus then contract rhythmically, moving the food toward the stomach. At the lower end, the lower oesophageal sphincter (LES) relaxes to allow food to pass into the stomach.

Prevention of Reflux:

The lower oesophageal sphincter (LES) acts as a valve to prevent stomach contents, including acid, from flowing back up into the oesophagus. This helps protect the oesophagus from damage due to stomach acid.

 

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