Intestines Anatomy Quiz
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Questions and Answers

Where does the upper lip lie?

  • At the ileocolic junction (correct)
  • At the ileocaecal orifice
  • At the posteromedial wall of the caecum
  • At the ileocaecal junction

    • Where is the vermiform appendix located?

  • Posteromedial wall of the caecum
  • Right iliac fossa (correct)
  • Left iliac fossa
  • Behind the colon

    • What causes the mechanical closure of the ileocaecal valve?

  • Contraction of the ileocaecal sphincter
  • Distension of the caecum (correct)
  • Sympathetic nerves
  • Parasympathetic nerves

    • Which direction does the appendix point in the retrocolic position?

    <p>Towards the spleen</p> Signup and view all the answers

    What is the function of the ileocaecal valve?

    <p>Prevents reflux from caecum to ileum</p> Signup and view all the answers

    What is formed by the fusion of the lips at the ends of the aperture?

    <p>Anterior and posterior frenula</p> Signup and view all the answers

    How does the sympathetic nervous system affect the ileocaecal valve?

    <p>Causes tonic contraction of ileocaecal sphincter</p> Signup and view all the answers

    What is a characteristic of the lower lip?

    <p>[It is concave and longer]</p> Signup and view all the answers

    Where is the flexure located?

    <p>On the lower part of the left kidney and diaphragm</p> Signup and view all the answers

    What structure attaches the flexure to the eleventh rib?

    <p>The phrenicocolic ligament</p> Signup and view all the answers

    What is the function of the phrenicocolic ligament?

    <p>To support the spleen and form a partial upper limit of the left paracolic gutter</p> Signup and view all the answers

    How long is the descending colon?

    <p>About 25 cm</p> Signup and view all the answers

    What is the relationship between the descending colon and the small intestine?

    <p>The descending colon is anterior to the coils of small intestine</p> Signup and view all the answers

    How long is the sigmoid colon?

    <p>About 37.5 cm</p> Signup and view all the answers

    How is the sigmoid colon positioned in the pelvis?

    <p>It hangs down in the pelvis over the bladder and uterus</p> Signup and view all the answers

    What structures are the sigmoid colon related to posteriorly?

    <p>All of the above</p> Signup and view all the answers

    Where does the jejunum begin?

    <p>Duodenojejunal flexure</p> Signup and view all the answers

    Which part of the small intestine constitutes the lower three-fifths of the mobile part?

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

    What is a distinguishing feature of the jejunum compared to the ileum?

    <p>Wider lumen and often empty</p> Signup and view all the answers

    What happens normally to Meckel's diverticulum during embryonic development?

    <p>Disappears during the 6th week of intrauterine life</p> Signup and view all the answers

    Where does the ileum terminate?

    <p>Ileocaecal junction</p> Signup and view all the answers

    What is a distinguishing feature of the ileum compared to the jejunum?

    <p>Larger and more closely set circular mucosal folds</p> Signup and view all the answers

    What does Meckel's diverticulum represent in embryonic development?

    <p>Persistence of vitellointestinal duct</p> Signup and view all the answers

    What is a feature that distinguishes Meckel's diverticulum from other structures?

    <p>Persistence beyond the first year of life</p> Signup and view all the answers

    Where is the caecum situated?

    <p>Right iliac fossa</p> Signup and view all the answers

    What are the dimensions of the caecum?

    <p>6 cm long and 7.5 cm broad</p> Signup and view all the answers

    Which arteries supply blood to the caecum?

    <p>Caecal branches of the ileocolic artery</p> Signup and view all the answers

    What guards the ileocaecal opening?

    <p>Ileocaecal valve</p> Signup and view all the answers

    What nerves innervate the caecum?

    <p>Genitofemoral, femoral, and lateral cutaneous nerve of thigh</p> Signup and view all the answers

    What is a diverticulum in relation to the colon?

    <p><em>Diverticulum refers to a small protrusion from the mucous membrane</em></p> Signup and view all the answers

    What is the approximate length of the ascending colon?

    <p>12.5 cm</p> Signup and view all the answers

    Where is the right colic flexure located?

    <p>At the junction of the ascending colon and transverse colon</p> Signup and view all the answers

    What is the approximate length of the transverse colon?

    <p>50 cm</p> Signup and view all the answers

    Which structure is the transverse colon related to anteriorly?

    <p>Greater omentum</p> Signup and view all the answers

    Where is the left colic flexure located?

    <p>At the junction of the transverse colon and descending colon</p> Signup and view all the answers

    Which structure is the transverse colon related to posteriorly?

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

    How is the transverse colon suspended?

    <p>By the transverse mesocolon attached to the anterior border of the pancreas</p> Signup and view all the answers

    What is the direction of the bend at the left colic flexure?

    <p>Downwards and backwards</p> Signup and view all the answers

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