Esophagus Anatomy Overview

Study Notes

Anatomy of the Esophagus

Connects the pharynx at the level of C6 to the stomach at T11, facilitating the passage of food.
Measures approximately 25 cm in length, allowing it to span the thoracic and abdominal cavities.
Positioned between the trachea and the spine, providing structural support and protection.

Function and Location

Crosses the diaphragm at T10 through the esophageal hiatus, a crucial transition point from thoracic to abdominal cavities.
The thoracic portion of the esophagus is extraperitoneal, while the abdominal section is intraperitoneal, affecting its anatomical relationships and potential pathologies.

Constrictions of the Esophagus

Constrictions occur at four specific locations:
- Cricopharyngeal sphincter located at C6, serving as the upper esophageal sphincter that regulates the entry of food.
- Intersection with the aortic arch at T4/T5, which may affect swallowing and the passage of food under certain conditions.
- Crossing of the left main bronchus at T5/T6, an anatomical landmark important for surgical approaches and pathology considerations.
- Diaphragmatic crossing at T10, marking another critical region for esophageal hernias and associated disorders.

Description

This quiz covers the anatomy of the esophagus, detailing its length, location, and the critical points where constrictions occur. It also examines the functional aspects of both the thoracic and abdominal portions of the esophagus, including their peritoneal positions. Test your knowledge of this vital digestive structure!