Esophagus

This tutorial by Matt from Kenhub covers the anatomy and physiology of the esophagus. It describes the esophagus as a fibromuscular tube connecting the pharynx to the stomach, highlighting its anatomical features, including constrictions, sphincters, and histological layers. The esophagus' musculature, pathway through the body, innervation, blood supply, and lymphatic drainage are detailed. The tutorial also explains the esophagus' histological layers, emphasizing their protective and functional roles.

What is the primary function of the esophagus?

• To produce saliva

• To digest food

• To connect the pharynx with the stomach

• To absorb nutrients

Which type of muscle is found in the superior third of the esophagus?

• Mixed muscle

• Skeletal muscle

• Cardiac muscle

• Smooth muscle

Through which part of the diaphragm does the esophagus pass?

• Right cross

• Left cross

• Esophageal hiatus

• Central tendon

Which layer of the esophagus contains mucous secreting glands?

• Submucosa

• Muscularis externa

• Mucosa

• Adventitia

What is the function of the nonkeratinized stratified squamous epithelium in the esophagus?

• To transport blood

• To protect against food, saliva, and mucus

• To secrete enzymes

• To absorb nutrients