Esophagus Cross Section

The esophagus is the muscular tube that sends the food from the oral cavity into the stomach.

Esophagus cross section. The esophagus is a muscular tube about ten inches 25 cm long extending from the hypopharynx to the stomach. Anatomically the esophagus is an entrance into the abdominal digestive organs. Slide 31 esophagus cross section workbook tasks.

When the patient is upright the esophagus is usually between 25 to 30 centimeters in length while its width averages 1 5 to 2 cm. This is a cross section of the esophagus. It is used to study the histology of the oesophagus and serves as an example of thick stratified squamous unkeratinizing epithelium.

The esophagus lies posterior to the trachea and the heart and passes through the mediastinum and the hiatus an opening in the diaphragm in its descent from the thoracic to the abdominal cavity. During swallowing the epiglottis tilts backwards to prevent food from going down the larynx and lungs. Except for the mouth the esophagus is the only organ not in the abdominal cavity.

Look at slide 50 in your slide set. The esophagus is a fibromuscular tube about 25 cm long in adults which travels behind the trachea and heart passes through the diaphragm and empties into the uppermost region of the stomach. Image 1 is a low power cross section of the esophagus.

It consists of muscles that run both longitudinally and circularly entering into the abdominal cavity via the right crus of the diaphragm at the level of the tenth thoracic vertebrae. This specimen is a section through the oesophagus. The muscularis is composed of an inner layer in which the fibres are circular and an outer layer of longitudinal fibres.

Because it is not in the abdomen it is not covered in the peritoneal membranes. To remix to adapt the work. This file is licensed under the creative commons attribution share alike 4 0 international license.