Embryo L1C | Development of the GI
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Questions and Answers

During which stage does the midgut undergo herniation, rotation, and retraction?

  • Adolescent stage
  • Neonatal stage
  • Embryonic stage (correct)
  • Fetal stage
  • Which part of the gut tube develops from the oropharyngeal membrane to the respiratory diverticulum?

  • Liver
  • Stomach
  • Gallbladder
  • Esophagus (correct)
  • What is the origin of the enteric nervous system in the GI tract?

  • Mesoderm
  • Endoderm
  • Dorsal mesentery
  • Ectoderm (correct)
  • Which structure extends from the lower end of the esophagus to the cloaca?

    <p>Dorsal mesentery</p> Signup and view all the answers

    What part of the gut tube develops from the left third of the transverse colon to the cloacal membrane?

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

    Which layer of the GI tract gives rise to the epithelial lining of the digestive tract?

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

    Which structure forms from the connection between the hepatic bud and the foregut?

    <p>Bile duct</p> Signup and view all the answers

    During the 4th week, what causes the stomach to appear as a fusiform dilation of the foregut?

    <p>Rotation around a longitudinal axis</p> Signup and view all the answers

    What is responsible for the development of hematopoietic cells, Kupffer cells, and connective tissue cells in the liver?

    <p>Mesoderm of the septum transversum</p> Signup and view all the answers

    Where are the pancreatic islets (Langerhans) developed from?

    <p>Parenchymal pancreatic tissue</p> Signup and view all the answers

    What marks the termination of the adult midgut?

    <p>Junction of the proximal two thirds of the transverse colon with the distal third</p> Signup and view all the answers

    What leads to the herniation of intestinal loops into the umbilical cord during the sixth week of development?

    <p>Rapid growth of the liver</p> Signup and view all the answers

    What characterizes the rotation of the primary intestinal loop?

    <p>Rotation around a longitudinal axis</p> Signup and view all the answers

    What results from the rupture of the cloacal membrane at the end of the seventh week?

    <p>Development of anal opening for hindgut</p> Signup and view all the answers

    What is formed by rotating around a longitudinal and an anterioposterior axis?

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

    Where are hematopoietic cells, Kupffer cells, and connective tissue cells derived from?

    <p>Mesoderm of septum transversum</p> Signup and view all the answers

    Which structure forms from fusion of dorsal and ventral buds?

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

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