Library · Anatomy
Esophagus
Make it clearer
The esophagus is the muscular tube that carries the food bolus, or chewed food, from the pharynx to the stomach. The bolus travels through the lumen, the hollow space at the center of the tube.
The wall has four layers wrapped around one another like the layers of a hose: mucosa, submucosa, muscularis propria, and adventitia. Together, they provide lining, support, movement, and attachment to nearby tissues.
In brief
The esophagus is a muscular tube that carries the food bolus, the mass of chewed food, from the pharynx to the stomach. Its lumen is the inner space through which that material travels.
The esophageal wall is organized into four layers: mucosa, submucosa, muscularis propria, and adventitia. This arrangement combines a durable lining with supportive tissue and muscle layers that can propel the bolus, while the adventitia anchors the organ to nearby structures.
Sources (1)
- National Center for Biotechnology InformationPhysiology, Esophagus
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