Rectum

Question 1

The rectum arises from what sacral level?

Answer 1

3rd sacral vertebra

Question 2

The peritoneum covers what surfaces of the rectum

Answer 2

Anterior and lateral surfaces

Question 3

Valves present in the rectum

Answer 3

Valves of Houston

Question 4

What structures are anterior of the rectum in females?

Answer 4

1. Sigmoid colon
2. Coils of ileum
3. Vagina

Question 5

What structures are anterior of the rectum in males?

Answer 5

1. Sigmoid colon
2. Coils of ileum
3. UB
4. vas deferens
5. Seminal vesicles
6. prostate

Question 6

The superior rectal artery is a branch of ____

Answer 6

IMA

Question 7

The middle rectal artery is a branch of the ___

Answer 7

Internal iliac

Question 8

The inferior rectal artery is a branch of the

Answer 8

internal pudendal to internal iliac

Question 9

The U-shaped sling that marks the start of the anal canal

Answer 9

Puborectalis

Question 10

[Rectum]

Upper 1/3 arterial supply is a branch of

Answer 10

IMA

Question 11

[Rectum]

the middle 1/3 arterial supply

Answer 11

Internal Iliac

Question 12

[Rectum]

The lower 1/3 arterial supply is a branch of

Answer 12

Internal pudendal

Question 13

[Rectum]

The upper 1/3 lymphatic drain to the ___

Answer 13

inferior mesenteric LN

Question 14

[Rectum]

the middle and inferior 2/3 LN drain to the

Answer 14

Internal iliac LN

Question 15

The anal canal is guarded by 2 sphincters. The external anal sphincter is made of ___ muscles

Answer 15

3 striated voluntary muscles

Question 16

What separates the anal canal into 2 segments

Answer 16

dentate line

each has a different embryonic origin

Question 17

[Embryology of the anal canal]

the upper part is derived from what embryonic layer?

Answer 17

Hindgut endoderm; columnar epithelium

sensitive to stretch with anal columns

Question 18

[Embryology of the anal canal]

the lower part of the anal canal is derived from?

Answer 18

Ectoderm

stratified squamous

sensitive to pain, temperature and touch

Question 19

What marks the start of the anatomic canal?

Answer 19

dentate line

ends at the anal verge

Question 20

What marks the start of the surgical anal canal?

Answer 20

anorectal ring or junction and ends at the anal verve

Question 21

Hemorrhoids can be palpated in what areas in the anus?

Answer 21

1. Left lateral
2. Right anterior
3. Right posterior

Question 22

what is the rule of 2 in meckel diverticulum

Answer 22

2 feet from the ileocecal junction

2% of the population

2 inches long