Pharynx and Esophagus Overview

Pharynx

Passageway connecting nasal/oral cavities to larynx/esophagus.

Nasopharynx

Upper pharynx section for air from nasal cavity.

Oropharynx

Middle pharynx section for food/air from oral cavity.

Laryngopharynx

Lower pharynx section directing air to larynx.

Bolus

Chewed food mixed with saliva ready for swallowing.

Swallowing Reflex

Involuntary actions during swallowing process.

Soft Palate

Muscle structure preventing food from entering nasal cavity.

Hyoid Bone

Bone that elevates during swallowing to aid food passage.

Epiglottis

Flap covering trachea during swallowing to prevent choking.

Peristalsis

Muscular contractions moving food through digestive tract.

Esophagus

Tube transporting food from pharynx to stomach.

Mucous Glands

Glands in esophagus moistening and lubricating lining.

Circular Fibers

Muscle fibers in esophagus aiding food retention.

Diaphragm

Muscle separating thoracic and abdominal cavities.

Mediastinum

Space in thorax containing the esophagus and trachea.