QuestionSBA
QuestionChoice
The rectum begins at the level of S3 where it is continuous with the signmoid colon and terminates as the anal canal. Here we can see the rectum and associated fascia.
10009305
a
Rectum
QuestionChoice
The uterus, found in females, is a more muscular organ and would have a smaller opening known as the cervical os. It is also found anterior to the rectum.
10009308
d
Uterus
QuestionChoice
The anal canal would normally be closed due to the internal and external anal sphincters which contract when there is no fecal matter in the rectum. The rectum has more prominent fascia as it is responsible for explusion of fecal matter.
10009306
b
Anal canal
QuestionChoice
The aorta terminates at the level of L4 as the common iliac arteries so would not be seen in this lower transverse cross section.
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e
Aorta
QuestionChoice
The bladder wall is made of detrusor muscle and is found anterior to the rectum. Although the posterior wall of the bladder and the rectum form a rectovesical pouch, this is 7.5 cm away from the anal canal and therefore not seen in this cross section.
10009307
c
Bladder
Concept
Chapter
2693
4097
Rectum
Topic
197
Abdominal anatomy
14409
Picture
1768
129 - Rectum.png
images/x09pajwd1682953206426.jpg
images/x09pajwd1682953206426_256.jpg
images/x09pajwd1682953206426_512.jpg
sBgOHYS2p5iJeIePh2d3ikd4gIQH
Topic
197
Abdominal anatomy
Identify the structure labelled by the arrow in the image below.

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a