Missk

The Digestive System: Anatomy Review

  1. List two main divisions of the digestive system.
        a. Gastrointestinal tract
        b. Accessory digestive
  2. The fourmain layers of the digestive tract wall are
        a.   Mucosa.
        b. Submucosa
        c. Serosa
        d. Muscularia externa
     
    3. The mucosa includes a type ofcolumnar cell that forms the inner lining of the lumen

    4. Blood and lymph vessels of the mucosa are found in its epithelial cell connective tissue layer.

    5. Thesmooth muscle layer of the mucosa is called the muscularis mucosae

    6. The function of epithelial goblet cells is to secrete substances used in digestion

    7. Enteroendocrinecells of the mucosa secrete hormones into the blood.

    8. Absorption of nutrients occurs through the mucosal epithelium and into either blood capillaries or lymph vessels.    9. The muscularis mucosa has both inner circular fibers and outer longitudinal fibers that function in moving the villi to aid in digestion and absorption.
    10. Thebuilt-in (intrinsic) network of nerve cells in the submucosa is the submucosal plexus.
  11.   The two types of movements produced by contractions of the muscularis externa areperistalsis and segmentation.
  12.   The network of neurons in between the two muscle layers of the muscularis externa is the myenteric plexus.
  13. The mouth, with its stratifiedsquamous epithelium, is involved in both chemical and food digestion.
  14. List the four regions of the stomach:
      a) cardia
      b) fundus
      c) body
      d) pyloricregion
  15. List the three sheets of muscle in the stomach’s muscularis externa:
      a) longitudinal muscle layer
      b) circular muscle layer
      c) oblique muscle layer