Abdominal Cavity Flashcards
What is the Inguinal Canal?
Passageway for the descent of the testies and spermatic cord.
Extends from the superficial inguinal ring to the deep inguinal ring.
Where is the Superficial inguinal ring located, and what is its shape?
Slit-like opening into the aponeurosis of the
External Abdominal Oblique
Where is the Deep inguinal ring located and what is its shape?
Triangular opening
Cranial border: Internal Abdominal Oblique (caudal border)
Medial border: Rectus abdominis (lateral border)
Caudal border: Inguinal ligament (caudal end of the External Abdominal Oblique)
What doe the Inguinal canal include?
Spermatic cord or vaginal process
External cremaster muscle
External pudendal artery and vein
Genitofemoral nerve
Efferent duct of the superficial inguinal lymph node
What are the boarders (landmarks) for the Abdominal Quadrants?
Center: Umbilicus
Median: Linea alba
Cross Section: L2 vertebra
What does the Abdominal Cavity contain?
Stomach —> Decending colon
Liver
Pancreas
Spleen
Kidneys
Female reproductive tract
Nerve plexuses
Vessels
Lymph nodes
Omental structures
What are the borders of the Abdominal Cavity?
Diaphragm - cranially, bilaterally
Lumbar vertebrae, Sublumbar muscles - dorsally
Abdominal muscles (EAO, IAO, TA) - bilaterally
Rectus abdominis, Rectus sheath and the linea alba - ventrally
Pelvic inlet - caudally continuous with the pelvic cavity
What is the Linea alba, what is it made up of, and what is its origin and insertion?
Midventral raphe
Formed by the aponeurotic insertions of the abdominal muscles.
Origin: Xiphoid cartilage
Blends with the prepublic tendon
Insertion: Pelvic symphysis
What are the layers of the Linea alba?
Aponerosis of:
External Abdominal Oblique M.
Internal Abdominal Oblique M.
Transversus Abdominis M.
Transverse fascia
What is peritoneum?
Largest and the most complex arranged serous membrance in the body.
Male: closed sac
Female: opens into the peritoneal cavity, via the ovarian bursa by the free end of the uterine tubes (abdominal ostium)
What is the function of Peritoneum?
Reduce friction between parts
What is underlined by the transverse fascia?
Peritoneum
What are the parts of Peritoneum?
Parietal peritoneum
Visceral peritoneum
Peritoneal cavity in-between
What are the boundaries of Pariental Peritoneum?
Abdominal wall
Abdominal surface of the diaphragm
Pelvic cavity (cranial portion)
Scrotal cavity and caginal process
What are the forms of Parietal Peritoneum?
Parietal vaginal tunics of spermatic cord and vaginal process
Vaginal rings (peritoneal cavity continuous w/ cavity of the vagnal tunic)
Where is the Visceral Peritoneum?
In the abdominal cavity
In the pelvic cavity (cranial portion)
What is the Peritoneal Cavity?
Potential space between the parietal and visceral peritoneum.
Contains small amount of serous fluid.
DOES NOT CONTAIN ORGANS!
Ova ovulate into the peritoneal cavity.
What are the parts of the Peritoneal cavity?
Greater sac (main region)
Lesser sac (omental bursa)
Epiploic foramen (communication between the two sacs)
Where is the Pararectal fossa?
Each side of the mesorectum
Where is the Rectogenital pouch?
Female:
- rectum dorsally
- vagina (cranial part) ventrally
Male:
- rectum dorsally
- genital fold ventrally
Where is the Vesicogenital pouch?
Female:
- vagina (cranial part) dorsally
- bladder and its lateral ligament ventrally
Male:
- genital fold dorsally
- bladder and its lateral ligament ventrally
Where is the Pubovesical pouch?
Between the flood of the pelvis and the bladder
What is the Mesentery and what are its function?
Double layer of peritoneum, which suspends most of the freely movable organs to the body walls
Supplies route for blood vessels, nerves and lymphatics
Many cases contains lymph nodes
What makes up the ‘Root of the Mesentery’ and where is is located?
Attaches to the dorsal abdominal wall (L1-L2)
Cranial mesenteric artery
Lymphatics
Mesenteric nerve plexus
What are the two parts of the Mesentery?
Dorsal Mesentery
Ventral Mesentery
What are the parts of the Dorsal Mesentery?
Greater omentum (embryo - dorsal mesogastrium)
Mesoduodenum (contains the right lobe of the pancreas)
Mesojejunum (Great Mesentery)
Mesoileum (Great Mesentery)
Mesocolon (ascending, transverse, decending)
Mesorectum
What is the location of the Great Mesentery?
Continuous
Cranially: deep leaf of the greater omentum
Caudally: descending mesocolon
What is the Ventral Mesentery?
Mainly derived from ventral mesogastrium.
What makes up the Ventral Mesentery?
Lesser omentum
Falciform ligament (embryo - Umbilical vein)
Median ligament of the Urinary bladder (embryo - Urachus)
Antimesenteric folds or ligaments (eg. Ileocecal fold)
What is the Omentum (Epiploon)?
Fold of peritoneum passing from the stomach to:
- dorsal abdominal wall
- the visceral surface of the liver
- from the cranial part of the duodenum to the visceral surface of the liver
What are the parts of the Omentum (Epiploon)?
Greater omentum
Lesser omentum
What is the Greater Omentum?
Areolar, four-layer peritoneal fold.
Where is the Greater Omentum dervied from?
Dorsal Mesogastrium
Where is the Greater Omentum located and what are its three parts?
Extends from the greater curvature of the stomach to the dorsal abdominal wall.
Parts:
Superficial Leaf
Deep Leaf
Omental Bursa
Describe the Superficial Leaf of the Greater Omentum.
Double layered (not able to grossly seperate)
Contans the spleen
Gastrospenic ligament - subdivision of the superficial leaf
Describe the Deep Leaf of the Greater Omentum.
Double Layered
Contains the Left lobe of the pancreas.
Describe the Omental Bursa of the Greater Omentum.
Between the superficial and deep layer
Stomach, liver, pancreas, greater and lesser omentum form the walls.
Where is the Lesser Omentum and where is it derived from?
Passes from the lesser curvature of the stomach and cranial part of the duodenum to the visceral surface of the liver.
Lays over the papillary process of the caudate lobe of the liver.
Derived from the Ventral Mesogastrium.
What are the parts of the Lesser Omentum?
Hepatogastric ligament
Hepatoduodenal ligament
? Continuous/contiguous with the Mesoduodenum
bile duct seperates the hepatoduodenal lig. and the mesoduodenum
What is the Epiploic Foramen (Foramen of Winslow)?
Short (about 3 cm), vertically flattened passage, which leads from the omental bursa to the peritoneal cavity.
What are the borders of the Epiploic Foramen?
Dorsal Boundary: Caudal vena cava
Ventral Boundary: Portal Vein
Lateral Boundary: Caudate process of the liver
What is the Clinical relevance of the Epiploic Foramen?
Area is the most common site of the extrahepatic portosystemic shunts.
What makes up the small intestine?
Duodenum
Jejunum
Ileum
What makes up the Large Intestine?
Cecum
Colon
Rectum
Anal Canal
Describe the stomach (Gaster).
Sac-shaped enlargement of the alimentary canal between the esophagus and the duodenum.
Where is the stomach located?
Left cranial quadrant, caudal to the liver.
Describe where the empty stomach is located.
Intrathoracic part of the abdominal cavity - can’t palpate
Separated from the abdominal wall
What is number 1?
Stomach
What is number 2?
Spleen
What is number 3?
Liver
Where is a moderately full stomach located?
T9-T11
Contact with the abdominal wall
Palpable
Where is a greatly distended stomach located?
T9-L2/L3
Extends into the caudal abdominal quadrants
Extensive contact with the abdominal wall
Easily palpable
What does the parietal surface of the stomach contact?
The liver and the diaphram
(NOT covered by the greater omentum)
Where does the visceral surface of the stomach contact?
the Intestine and the Pancreas
(covered by the greater omentum)
What is the surface at number 1, be specific?
Parietal surface of the stomach
What is the surface at number 2, be specific?
Visceral surface of the stomach
What is number 3?
Intestine mass
What is number 4?
Liver
What are the regions of the stomach?
Cardiac portion
Fundus
Body
Pyloric portion
Describe the cardiac portion of the stomach.
Surrounds the cardiac opening
Describe the Fundus portion of the stomach.
Blind sac dorsal to the cardia
Describe the body portion of the stomach.
Middle portion between the fundus and pyloric portion
What are the two parts of the Pyloric portion of the stomach, describe each.
Pyloric antrum : thin-walled, wider proximal part
Pyloric canal : thick-walled, narrower distal part
What is number 1?
Cardiac portion of the stomach
What is number 2?
Esophagus
What is number 3?
Fundus region of the stomach
What is number 4?
Body region of the stomach
What is number 5?
Pyloric portion of the stomach
Describe the curvatures of the stomach.
- *Greater curvature**
- convex ventral border
- extending from the cardia to the pylorus (long way)
- *Lesser curvature**
- concave dorsal border
- extending from the cardia to the pylorus (short way)
Describe the openings of the stomach.
- *Cardiac ostium (cardia)**
- inlet : controlled by the cardiac sphincter
- *Pyloric ostium (pylorus)**
- outlet : controlled by the pyloric sphincter
Describe the notches of the stomach.
- *Cardiac notch**
- between the cardia and the fundus
- *Angular notch**
- lower part of the lesser curvature
What is number 1?
Gastric groove
What is number 2?
Esophagus
What is number 3?
Cardiac notch
What is number 4?
Cardiac ostium and cardiac sphinter
What is number 5?
Fundus
What is number 6?
Body
What is number 7?
Greater curvature
What is number 8?
Rugae - gastric folds
What is number 9?
Pyloric antrum
What is number 10?
Pyloric ostium and pyloric sphincter
What is number 11?
Pyloric canal
What is number 12?
Angular notch
What is the red line without a number at the top pointing towards?
Lesser curvature
What is number 13?
Common bile duct
What is number 14?
Major duodenal papilla
What is number 15?
Pancreatic duct
What is number 16?
Minor duodenal papilia
What is number 17?
Accessory pancreatic duct
What is the ligament that connects the Liver to the lesser curvature of the stomach?
Hepatogastric ligament
What is the ligament that connects the Greater curvature of the stomach to the Spleen?
Gastrosplenic ligament
What is the ligament that connects the Esophageal hiatus to the Cardia of the stomach?
Gastrophrenic ligament
Whare the parts of the Small Intestine?
Duodenum
Jejunum
Ileum
What are the parts of the Large Intestine?
Cecum
Colon
Rectum
Anus
What is B?
Duodenum of the Small Intestine
What is C?
Jejunum of the Small Intestine
What is D?
Ileum of the Small Intestine
What is E?
Cecum
What is F?
Colon
What is F’?
Colon
What is G?
Colon
What is H?
Colon
What is O?
Right colic flexure