Peritoneal Cavity Flashcards
What makes up the foregut?
- Oesophagus
- Stomach
- Proximal half of the duodenum
- Liver
- Pancreas
What makes up the midgut?
- Distal half of the duodenum
- Jejunum
- Ileum
- Caecum
- Ascending colon
- 3/4 of the transverse colon
What makes up the hindgut?
- 1/4 of the transverse colon
- Descending colon
- Sigmoid colon
- Rectum
What is the abdomen?
The part of the body below the diaphragm.
Where in the anterior abdominal wall are the external oblique muscles located?
From the other surface of the lower 8 ribs to the linea alba, iliac crest and pubic tubercle
What is the linea alba?
A fibrous structure that runs down the middle of the abdomen from the diploid process to the pubic symphysis
What is the origin of the internal oblique muscles?
The lateral 1/3 of the inguinal ligament and anterior 2/3 of the iliac crest
What is the insertion of the internal oblique muscles?
- Linea alba
- Costal margin
- Crest of the pubic bone
What is the origin of the transverses abdominis?
- Lateral 1/3 of inguinal ligament
- Interior surface of the lower 6 ribs
- Iliac crest
What is the insertion of the transverse abdominis?
- Linea alba
- Pubic crest
What is the origin of the rectus abdominis?
- Pubic symphysis
- Pubic crest
What is the insertion of the rectus abdominis?
- Xyphoid process
- Costal cartilage of 5th, 6th and 7th rib
What arteries supply the the muscles of the anterior abdominal wall?
- Superior epigastric
- Inferior epigastric
- Intercostal
- Circumflex iliac
Which vein drains the muscles of the anterior abdominal wall?
Thoracoepigastric vein (between the lateral thoracic vein and superior epigastric vein)
What is the innervation of the muscles of the anterior abdominal wall?
- Thoracoabdominal nerves
- Subcostal nerves (rectus abdominis)
What is the function of the transverse abdominis?
Compress and support viscera
What is the function of the rectus abdominis?
To flex the trunk and compress viscera
What is mesentery?
Folds of the peritoneum that attaches organs to the posterior wall of the abdomen. It can act as a pathway for blood, nerves and lymphatics to reach the gut
Examples of dorsal mesentery
- Greater ommentum
- Ligament of the large intestine
- Ligament of the small intestine
- Lienorenal ligament
- Gastrosplenic ligament
Examples of ventral mesentery
- Falciform ligament
- Lesser ommentum
What is the inguinal canal?
- Located in the inferior abdomen
- Serves as a passage way for spermatic cord and round ligament of the uterus
- The genital nerve passes through this
- It is larger in males
What does ASIS stand for?
Anterior Superior Iliac Spine
