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Colon Anatomy: Descending and Sigmoid Colon

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Colon Anatomy: Descending and Sigmoid Colon

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Questions and Answers

What is the most distal segment of the large intestine?

Rectum (correct)

Sigmoid colon

Transverse colon

Descending colon

What is the purpose of the anorectal flexure?

To increase the volume of the rectum

To allow for the passage of feces

To contribute to faecal continence (correct)

To provide structural support to the rectum

Which of the following is NOT a characteristic of the inferior mesenteric artery?

Supplies the small intestine (correct)

Supplies the sigmoid colon

Supplies the rectum

Supplies the distal one third of the transverse colon

Which of the following statements about the rectum is FALSE?

It has a role in the digestive process Signup and view all the answers

What part of the colon is retroperitoneal in the majority of individuals?

Descending colon Signup and view all the answers

What is the direction of the sacral flexure of the rectum?

Anteroposterior curve with concavity anteriorly Signup and view all the answers

Which structure attaches the sigmoid colon to the posterior pelvic wall?

Sigmoid mesocolon Signup and view all the answers

What is the approximate length of the sigmoid colon?

40 cm Signup and view all the answers

What is one of the functions of the mesentery?

Provides a conduit for blood vessels, nerves, and lymphatic vessels Signup and view all the answers

Which artery supplies the organs of the midgut, from the major duodenal papilla to the proximal two-thirds of the transverse colon?

Superior mesenteric artery Signup and view all the answers

Which of the following statements about the sigmoid colon is true?

It has a characteristic 'S' shape due to its long mesentery Signup and view all the answers