Intestines Anatomy Quiz

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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?

Towards the spleen Signup and view all the answers

What is the function of the ileocaecal valve?

Prevents reflux from caecum to ileum Signup and view all the answers

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

Anterior and posterior frenula Signup and view all the answers

How does the sympathetic nervous system affect the ileocaecal valve?

Causes tonic contraction of ileocaecal sphincter Signup and view all the answers

What is a characteristic of the lower lip?

[It is concave and longer] Signup and view all the answers

Where is the flexure located?

On the lower part of the left kidney and diaphragm Signup and view all the answers

What structure attaches the flexure to the eleventh rib?

The phrenicocolic ligament Signup and view all the answers

What is the function of the phrenicocolic ligament?

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

How long is the descending colon?

About 25 cm Signup and view all the answers

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

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

How long is the sigmoid colon?

About 37.5 cm Signup and view all the answers

How is the sigmoid colon positioned in the pelvis?

It hangs down in the pelvis over the bladder and uterus Signup and view all the answers

What structures are the sigmoid colon related to posteriorly?

All of the above Signup and view all the answers

Where does the jejunum begin?

Duodenojejunal flexure Signup and view all the answers

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

Ileum Signup and view all the answers

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

Wider lumen and often empty Signup and view all the answers

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

Disappears during the 6th week of intrauterine life Signup and view all the answers

Where does the ileum terminate?

Ileocaecal junction Signup and view all the answers

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

Larger and more closely set circular mucosal folds Signup and view all the answers

What does Meckel's diverticulum represent in embryonic development?

Persistence of vitellointestinal duct Signup and view all the answers

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

Persistence beyond the first year of life Signup and view all the answers

Where is the caecum situated?

Right iliac fossa Signup and view all the answers

What are the dimensions of the caecum?

6 cm long and 7.5 cm broad Signup and view all the answers

Which arteries supply blood to the caecum?

Caecal branches of the ileocolic artery Signup and view all the answers

What guards the ileocaecal opening?

Ileocaecal valve Signup and view all the answers

What nerves innervate the caecum?

Genitofemoral, femoral, and lateral cutaneous nerve of thigh Signup and view all the answers

What is a diverticulum in relation to the colon?

Diverticulum refers to a small protrusion from the mucous membrane Signup and view all the answers

What is the approximate length of the ascending colon?

12.5 cm Signup and view all the answers

Where is the right colic flexure located?

At the junction of the ascending colon and transverse colon Signup and view all the answers

What is the approximate length of the transverse colon?

50 cm Signup and view all the answers

Which structure is the transverse colon related to anteriorly?

Greater omentum Signup and view all the answers

Where is the left colic flexure located?

At the junction of the transverse colon and descending colon Signup and view all the answers

Which structure is the transverse colon related to posteriorly?

Pancreas Signup and view all the answers

How is the transverse colon suspended?

By the transverse mesocolon attached to the anterior border of the pancreas Signup and view all the answers

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

Downwards and backwards Signup and view all the answers