Lecture 24 - Abdominal walls & Peritoneum Flashcards
The external abdominal oblique muscle originates from where?
lateral surfaces of ribs and thoracolumbar fascia
The external abdominal oblique muscle inserts where?
linea alba and prepubic tendon by a wide aponeurosis
The internal abdominal oblique muscle originates from where?
thoracolumbar fascia, ventral iliac spines, and inguinal ligament
The internal abdominal oblique muscle inserts where?
on costal arch, rectus abdominis, linea alba, and prepubic tendon by a wide aponeurosis
The transverse abdominis muscle originates from where?
medial surfaces of the last 4 to 5 ribs and transverse processes of the lumbar vertebrae
The rectus abdominis muscle courses between prepubic tendon and sternum and what?
first few ribs
The rectus sheath is formed by the aponeurosis of which 3 muscles?
external abdominal oblique muscle, internal abdominal oblique muscle, and transversus abdominis muscle
What 5 structures pass through the inguinal canal?
External pudendal artery a, Genitofemoral n, lymphatics, vaginal process or tunics, and spermatic cord
The inguinal canal extends between the _____ and _____ inguinal rings.
superficial, deep
The superficial inguinal ring sits in the aponeurosis of what muscle?
external abdominal oblique muscle
The inguinal ligament is the caudal border of the aponeurosis of what muscle?
external abdominal oblique muscle
The vascular lacuna is the passageway for vessels coursing to what?
the pelvic limb
In females, the peritoneal sac is named what? It passes through the inguinal canal.
vaginal process
The deep circumflex iliac artery from the aorta supplies what aspect of the abdominal wall?
caudal lateral aspect
The cranial abdominal artery from the phrenicoabdominal artery supplies what part of the abdominal wall?
cranial wall
The cranial (deep and superficial) epigastric arteries from the internal thoracic artery supplies what aspect of the abdominal wall?
cranial ventral aspect
The caudal (deep and superficial) epigastric arteries from the pudendoepigastric trunk supply what part of the abdominal wall?
ventral walls
The cranial epigastric artery supplies what muscle?
rectus abdominis muscle
The cranial superficial epigastric artery branches from what artery?
internal thoracic artery
What two types of mammary glands are the most active?
abdominal and inguinal
The caudal superficial epigastric artery branches from what trunk?
pudendoepigastric trunk
What artery enlarges in females that are producing milk?
caudal superficial epigastric artery
What is the official name for the ventral branch of spinal nerve T13?
costoabdominal nerve
What is the official name for the ventral branch of spinal nerve L1?
cranial iliohypogastric nerve
What is the official name for the ventral branch of spinal nerve L2?
caudal iliohypogastric nerve
What is the official name for the ventral branch of spinal nerve L3?
ilioinguinal nerve
What is the official name for the ventral branch of spinal nerve L4?
lateral cutaneous femoral nerve
Where is the lumbosacral plexus located?
L3 to S1
T/F: The costoabdominal nerve is caudal to the last rib.
T
Costoabdominal nerve, cranial iliohypogastric nerve, and caudal iliohypogastric nerve innervate what?
abdominal muscles and subcutaneous area
What region does the ilioinguinal nerve innervate?
lateral inguinal region
What area does the lateral cutaneous femoral nerve innervate?
area of quadriceps
Does the costoabdominal nerve supply motor or sensory?
both
Does the cranial iliohypogastric nerve supply motor or sensory?
both
Does the caudal iliohypogastric nerve supply motor or sensory?
both
Does the ilioinguinal nerve supply motor or sensory?
both
Does the lateral cutaneous femoral nerve supply motor or sensory?
sensory
The umbilical region is around what nerve?
intercostal nerve
What is the official name for the ventral branch of spinal nerve T10?
intercostal nerve T10
What is the official name for the ventral branch of spinal nerve T11?
intercostal nerve T11
What is the official name for the ventral branch of spinal nerve T12?
intercostal nerve t12
What do the intercostal nerves T10 to T12 innervate?
most cranial portion of abdominal wall
T/F: There is an obvious barrier between the abdominal and pelvic cavity.
F
What part of the peritoneum covers the abdominal walls?
parietal peritoneum
What part of the peritoneum covers most abdominal organs?
visceral peritoneum
What part of the peritoneum connects the parietal and visceral peritoneums?
connecting peritoneum
What is the connective tissue that glues the parietal peritoneum with the cavity walls?
transverse fascia
Adults only have 1 peritoneal cavity, but embryos have how many?
2
The ventral mesentery disappears in the fetus and adult except for the most cranial and caudal portions that are still on what 2 organs?
liver and urinary bladder
The dorsal mesentery in the embryo becomes what in the adult?
greater omentum
What structures connect the intestines to the dorsal portion of the abdomen? This is a general term, and they have different names for different locations.
mesos
The greater omentum is connected to what part of the stomach?
greater curvature
The omental bursa is a virtual space that is found between what 2 structures?
superficial leaf and deep leaf of the greater omentum
The epiploic foramen connects the omental bursa with what in the right side of the abdomen?
peritoneal cavity
What 4 organs are not covered by the greater omentum?
liver, stomach, spleen, and urinary bladder
What structures are considered to be retroperitoneal?
kidneys, adrenal glands, caudal vena cava, descending aorta
Which lobe of the pancreas is related to the omentum?
left lobe
What is the structure that is the communication between the urinary bladder and umbilicus in the fetus?
uracus
The lesser omentum is a plica of the peritoneum that connects the lesser curvature of the stomach to part of what?
the duodenum
What is the structure that runs from the bladder to the umbilicus? It is considered to be a plica of the peritoneum.
median ligament of the urinary bladder
The falciform ligament of the liver is very large and active in the fetus, and runs through what structure in the fetus?
umbilicus
What structure in the adult is the remnant of the uracus from the fetus?
median ligament of the urinary bladder
What is fetal feces called?
meconium
The portion of the lesser omentum that connects the lesser curvature of the stomach of the liver is called what?
hepatogastric ligament
The portion of the lesser omentum that connects the first part of the duodenum with the liver is called what?
hepatoduodenal ligament