Ascending and transverse colon (Dave's notes) Flashcards Preview

Anatomy: Abdomen (Dave's notes) > Ascending and transverse colon (Dave's notes) > Flashcards

Flashcards in Ascending and transverse colon (Dave's notes) Deck (10)
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1
Q

Describe the length and boundaries of the ascending colon

A

15cm long from the ileocaecal junction to the hepatic flexure

2
Q

What are the relations of the ascending colon?

A

The ascending colon lies on the iliac fascia and the anterior layer of the lumbar fascia. The right paracolic gutter lieslaterally. An embryonic mesentary is retained in 10% of adults.

3
Q

Describe the teniae coli of the ascending colon

A

The teniae coli of the ascending colon lie anterior, posteriomedial and posteriolateral. The wall is sacculated between them.

4
Q

Describe the appendices epoploicae of the ascending colon

A

The appendices epiploicae project from the serous coat. Blood vessels to these perforate the muscle wall and may form a tract from mucous membran perforation = diverticulae

5
Q

What is the blood supply of the ascending colon?

A

Ileocolic and right colic from SMA

6
Q

Describe the length and boundaries of the transverse colon

A

45cm in length from hepatic to splenic flexure. hangs down to a variable extent in contact with the anterior abdominal wall. Completely invested in peritoneum

7
Q

What are the relations of the transverse mesocolon

A

The transverse mesocolon hangs from the right kidney, D2, pancreas, and the inferior pole of the left kidney

8
Q

Describe the teniae coli of the transverse colon

A

The teniae of the transverse colon rotate such that the antior tenia of the ascending colon becomes the posterior tenia of the transverse colon.

9
Q

How do the appendices epiploicae of the transverse colon differ to those of the ascending colon?

A

They are larger and more numerous

10
Q

What is the blood supply of the transverse colon? What is the significance of this?

A

The blood supply of the transverse colon is - for the proximal 2/3, from the ???right middle colic from the SMA, and for the distal 1/3rd, from the left colic, from the IMA. This leaves an avascular window.