28 Questions
Where is the vermiform appendix located?
Right iliac fossa
What is the main function of the ileocecal valve?
Prevents reflux of cecal contents
Which arteries supply blood to the caecum?
Caecal branches of ileocecal artery
What is the length of the vermiform appendix?
8 to 9 cm
Which nerves supply the caecum?
Vagus nerve
What structures surround the ileocecal orifice?
Lower and upper lips of the ileocecal valve
Where is McBurney's Point located?
At the junction of lateral third and medial two-thirds of the line from the anterior superior iliac spine to the umbilicus on the right side
Which part of the colon is retroperitoneal?
Descending colon
What percentage of appendix positions is retrocecal?
60%
Where does the sigmoid colon travel to?
From left iliac fossa until 3rd sacral vertebra
Which structure is found at the rectosigmoid junction?
Sigmoid colon
What is the length of the descending colon?
25 cm
What is the main characteristic of diverticulosis?
Herniation of colonic mucosa through the muscular wall
In what way does colorectal cancer spread?
By infiltration through the colonic wall
What is a common symptom of internal hemorrhoids?
Painlessness
Where are diverticular expansions in diverticulosis typically visible?
On the external surface of the bowel
What distinguishes hemorrhoids from colorectal cancer and diverticulosis?
Swollen veins in the anus and lower rectum
Where does the 3rd part of the duodenum pass in front of?
Abdominal aorta
What marks the border between the upper and lower gastrointestinal tract?
Ligament of Treitz
Where is the junction held by the ligament of Treitz attached to?
Right crus of diaphragm
Which structure is crossed by the superior mesenteric vein and root of mesentery in the duodenum?
Aorta
Where does the major duodenal papilla open?
Hepatopancreatic ampulla
What structure is located at the lateral relation of the 3rd part of the duodenum?
Right colic flexure
What is the peritoneal covering associated with the lower 1/3 of the anal canal?
No peritoneum associated
What structures are found anterior to the anal canal in males?
Ductus deferens and seminal vesicles
What forms the pectinate line in the anal canal?
Anal valves
Which muscle controls defecation and is voluntary in nature?
External anal sphincter
What innervates the superior part of the rectum and anal canal sympathetically?
Inferior hypogastric plexus
Test your knowledge on the positions and anatomical features of the appendix and ascending colon. From the variable positions of the appendix to the length and location of the ascending colon, this quiz will help you review key anatomical details.
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