Layers of Digestive System: Epithelium, Lamina Propria, Muscularis Mucosae
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Questions and Answers

Which type of muscle does the upper esophageal sphincter consist of?

  • Cardiac muscle
  • Visceral muscle
  • Smooth muscle
  • Striated muscle (correct)

    • What is the primary function of the lower esophageal sphincter?

  • Regulates breathing
  • Regulates movement of food from the esophagus to the stomach (correct)
  • Regulates movement of food from the pharynx to the esophagus
  • Regulates blood flow

    • Which muscle is responsible for producing the upper esophageal sphincter?

  • Biceps brachii muscle
  • Sternocleidomastoid muscle
  • Gluteus maximus muscle
  • Cricopharyngeus muscle (correct)

    • Where is the lower esophageal sphincter located?

    <p>At the gastro-oesophageal junction</p> Signup and view all the answers

    What does the very distal portion of the oesophagus have as an outer covering?

    <p>Serosa</p> Signup and view all the answers

    Which layer of connective tissue is identified as the adventitia in the oesophagus?

    <p>Submucosa</p> Signup and view all the answers

    In which part of the esophagus do we find gastric mucosa?

    <p>Lower esophagus</p> Signup and view all the answers

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