Anatomy Colon Flashcards

1
Q

At what point does the sigmoid colon terminate

A

S3 where it is continuous with the rectum

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2
Q

Where does the ascending colon terminate?

A

At the right colic flexure (hepatic flexure)

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3
Q

What is the attachment of the transverse colon to the posterior abdominal wall

A

Transverse mesocolon

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4
Q

What is the attachment between the attachment between the transverse colon and the greater curvature of the stomach

A

Gastrocolic ligament

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5
Q

Where does the transverse mesocolon terminate and become the descending colon?

A

The left colic flexure or the splenic flexure

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6
Q

What is the peritoneal attachment of the sigmoid colon?

A

The sigmoid mesocolon

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7
Q

What sort of peritoneal covering does the rectum have?

A

None
Trick question lol

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8
Q

Where does the rectum lie

A

Anterior to half of the sacrum and the coccyx

Posterior to the bladder, prostate and in women the uterus

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9
Q

What sort of muscle lines the outside of the rectum?

A

Longitudinal muscle cells called Taenia coli muscle

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10
Q

What is the name of the lower part of the rectum?

A

The ampulla of the rectum

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11
Q

What lies medially to the rectum?

A

Fatty connective tissue lie on either side of then rectum

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12
Q

What forms the pelvic diaphragm

A

Lavator ani anterior

Coccygeus muscle posterior

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13
Q

What part of the elevator ani sits in front of the rectum?

A

The puborectais part

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14
Q

What is the angle formed between the rectum and anal canal

A

The perineal flexure

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15
Q

What maintains the perineal flexure between the rectum and the anal canal?

A

The pbuorectalis part of the levator ani

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16
Q

What maintaines the closure of the anal canal

A

Involuntary internal anal sphincter muscles

Voluntary external anal sphincter muscles

17
Q

What is the internal anal sphincter muscles a continuation of?

A

The circular smooth muscle of the intestine

18
Q

What are the ligament attachments of the external involuntary anal sphincter muscles?

A

Anococcygeal ligament (posteriorly)

Central perineal tendon anteriorly

19
Q

What portion of the internal sphincter muscles of the anal canal does it cover?

A

Proximal 2/3 of the anal canal

20
Q

Artery of the midgut and what it supplies

A

Superior mesenteric
Distal duodenum
Jejunoileum
Ascending colon
First part of the transverse colon

21
Q

At what level does the superior mesenteric originate

A

L1

22
Q

Branches of the superior mesenteric

A

Pancreaticoduodenal artery

Right colic artery

Ileocolic artery

Ileal artery

Mid colic artery

Jejunal artery

23
Q

Pancreaticoduodenal artery supplies blood to…

A

Inferior head of pancreas

Distal portion of the duodenum

24
Q

Jejunal artery supplies….

A

The jejunum

25
Q

The ileal artery supplies the…

A

Ileum

26
Q

The mid colic artery supplies the….

A

Proximal portion of the transverse colon

27
Q

The right colic artery supplies the…

A

Ascending colon

28
Q

The ileocolic artery supplies the….

A

Ascending colon

Appendix

Caecum

Ileum

29
Q

Label the superior mesenteric branches

A
30
Q

Artery of the hind gut

A

Inferior mesenteric artery

31
Q

Origin of the inferior mesenteric artery

A

Abdominal aorta at L3

32
Q

Branches of the inferior mesenteric artery

A

Left colic artery Middle sigmoid colon Lower superior rectal artery

33
Q

Left colic artery supplies the…

A

Ascending part of the colon Distal transverse colon

34
Q

Sigmoidal branches supply the….

A

Middle Sigmoid colon

35
Q

Superior rectal artery supplies…

A

Upper part of the rectum