3.1.5 The Rectum and Anal Canal Flashcards
What pierces the Pelvic Floor?
The Rectum
At what point does the Rectum pierce the Pelvic Floor?
At the Ano-Rectal Junction
What is connected to the Ano-Rectal Junction, inside the Peritoneum?
The Anal Canal
What is the Arterial Supply to the Superior 1/3 of the Rectum?
The Superior Rectal Artery
What is the Arterial Supply to the Middle 1/3 of the Rectum?
The Middle Rectal Artery
What is the Arterial Supply to the Inferior 1/3 of the Rectum?
The Inferior Rectal Artery
What is the Venous Drainage of the Superior 1/3 of the Rectum?
The Superior Rectal Vein
What is the Venous Drainage of the Middle 1/3 of the Rectum?
The Middle Rectal Vein
What is the Venous Drainage of the Inferior 1/3 of the Rectum?
The Inferior Rectal Vein
What is the Peritonisation of the Superior 1/3 of the Rectum?
It is Retroperitoneal
What is the Peritonisation of the Middle 1/3 of the Rectum?
It is Retroperitoneal
What is the Peritonisation of the Inferior 1/3 of the Rectum?
It is Extraperitoneal (Sub-Peritoneal)
What is the role of the Pelvic Floor in maintaining Faecal Continence?
It maintains the curve of the Ano-Rectal Flexure
Other than the Pelvic Floor, what other structures are involves in Faecal Continence?
- The Internal Anal Sphincter
- The External Anal Sphincter
What is the Internal Anal Sphincter innervated by?
Autonomic Visceral Nerve Fibres
