Quiz 5 Flashcards
What arteries supply the abdominal muscles (wall)
- cranial abdominal artery
- cranial epigastric artery
- caudal epigastric artery
- deep circumflex iliac artery
What nerves supply the ventral and lateral abdominal wall
- cranial iliohypogastric nerve (L1)
- caudal iliohypogastric nerve (L2)
- ilioinguinal nerve (L3)
- lateral cutaneous femoral nerve (L4)
What is the order of the deep vessels of the abdominal wall
abdominal aorta external iliac artery - femoral artery deep femoral artery pudendoepigastric trunk - caudal epigastric artery - external pudendal artery -> caudal superficial epigastric artery (cse)
What does the caudal superficial epigastric artery supply?
- cranial and caudal abdominal
- inguinal mammae and prepuce in male
small dorsal branch of cse supplies
- scrotum in males
- labia in females
Where does the external pudendal artery originate and emerge
originates from pudoendoepigastric trunk
emerges from superficial inguinal ring
What does external pudendal artery give rise to and supply
gives rise to caudal superficial epigastric artey
supplies blood to gracilis muscle
What is the vaginal tunic
double peritoneal fold which encloses the spermatic cord and testis
What makes up the vaginal tunic
- a visceral layer which is adherent to the testis and cord
- a parietal layer which lines the scrotum and the inguinal canal
What is the vaginal process
the diverticulum which encloses the round ligament of the uterus
Where is the vaginal process found
in the free edge of the broad ligament
it passes from caudal pole of the ovary to the inguinal canal
What are the structures passing through the inguinal canal in males
- external pudendal artery and vein
- genitofemoral nerve
- cremaster muscle
- spermatic cord
What are the structures passing through the inguinal canal in females
- external pudendal artery and vein
- genitofemoral nerve
- vaginal process
Where does the genitofemoral nerve arise
ventral branch part of L3 and L4
what does the genitofemoral nerve innervate
the cremaster muscle
part of the prepuce
Where does the cremaster muscle arise and where does it attach
arises from the internal abdominal oblique muscle muscle
attaches to the parietal vaginal tunic near the testis
What is the role of the cremaster muscle
raise and lower the scrotum in order to regulate the temperature of the testis and promote spermatogenesis
What carries the spermatic cord through the inguinal canal
the descent of the testis
What does the spermatic cord contain
- vas deferens
- testicular artery
- testicular vein (pampiniform plexus)
- testicular lymph vessels
- testicular nerve plexus (L3-L5)-ANS
What does the genitofemoral nerve innervate
the pubic area
What is in the vaginal process
peritoneal diverticulum accompanied by round ligament of uterus
What is the falciform ligament
fold of peritoneum that passes from the umbilicus to the diaphragm and also attaches to the liver
what is the round ligament of the liver and where is it found
- fetal remnant of the umbilical vein
- found in the free margin of falciform ligament
what does the median ligament of the bladder contain in the fetus
in the fetus it contains the urachus (stalk of the embryonic allantois)
what is the round ligament of bladder
the remnants of the umbilical arteries in the lateral ligaments of the blasser
where is the round ligament of the bladder
caudal to the umbilicus
attaches to bladder
what is the urachus
the fetal remnant of the allantoid (embryonic membrane)
a canal that drains the urinary bladder of the fetus that runs within the umbilical cord
what are the umbilical arteries
branches of the internal iliac arteries
What is the role of the bilateral umbilical arteries
carry the blood from the fetus to the placenta and are components of the umbilical cord.
What happens to the umbilical arteries when the umbilical cord is severed
the arteries retract and become fibrous cords between the bladder and the umbilicus that disappear in the young dog and are rarely visible in dogs
What happens to the narrowed lumen of the umbilical arteries after cord is severed
they remain patent between the internal iliac artery and the bladder where the relatively minute vesicle artery leaves the umblical artery to vascularize the apex and body of the bladder.
What is viscus
an internal organ of the abdomen
what is the greaer omentum
double layered sac
attaches to the curvature of the stomach
What are the parts of the greater omentum
two leaves:
- superficial (ventral body wall)
- deep (abdominal organs)
space in between: omental bursa
What are the characteristics of the greater omentum
its lacelike with fate depositions along vessel
covers the jejunum and ileum
wha is the gastroplenic ligament
section of greater omentum that attached to the spleen and the stomach
what happens to the urinary bladder when contracted (empty)
it lies of the pelvic floor of the pelvic inlet (area between the abdomen and the pelvis)
what happens to the urinary bladder when distended (full)
it lies on the floor of the abdomen and adapts in shape by displacing movable viscera (can reach transverse plane to umbilicus)
what does the uterus consist of
- short cervix
- body
- two long horns
Where is the uterus when gravid
it lies on the floor of the abdomen
the horns gravitate cranially and ventrally to lie medial to costal arch
Where is the spleen located
in the superficial leaf (omentum) along greater curvature of stomach
caudally it can reach a transverse plane to midlumbar region
What is the function of the spleen in the circulatory system
functions in the destruction of old red blood cells
What is the function of the spleen in the immune system
it provides lymphocytes/antibodies to the immune system
its absence could lead to a predisposition to certain infections
What is the diaphragm
a muscular partition between thoracic and abdominal cavities
it is the muscle of inspiration
What are the different parts of the diaphragm
- tendinous center
- muscular periphery
- cupula
- aortic hiatus
- esophageal hiatus
- caval foramen
- arterial supply
what is the aortic hiatus
passageway for aorta, azygos vein, thoracic duct
what is the esophageal hiatus
passageway for esophagus, vagal nerve trunk, esophageal vessels
what is the caval foramen
passageway for caudal vena cava
what is the arterial supply
the phrenic artery between cranial mesenteric artery and renal artery
What is the role of the liver
secretes bile salts which emulsify ingested fat to be stored in the gallbladder
What are the 6 lobes of the liver
- right medial lobe
- right lateral lobe
- quadrae lobe
- left medial lobe
- left lateral lobe
- caudate lobe
What are the parts of the caudate lobe
- caudate process (renal impression)
- papillary process lies in lesser curvature of stomach)
where is the gallbladder located
in a fossa between the quadrate and right medial lobe of the liver
what does the neck of the gallbladder become
neck area continues as cystic duct
what forms the bile duct
the union of hepatic and cystic ducts
where does the bile duct go
it courses through the wall of descending duodenum and terminates at the major duodenal papilla
where is the pancreas located
in the greater omentum
what are the parts of the pancreas
- left lobe
- body
- right lobe
what is the role of the pancreas
to secrete proteolytic enzymes and insulin
what are proteolytic enzymes
digestive enzymes
chemicals that break down food for digestion
critical for normal food digestion and absorption of fats
what is insulin
important hormone that controls blood sugar levels
what are the ducts of the pancreas
- pancreatic duct (smaller)
- accessory pancreatic duct (larger)
what is the role of the pancreatic duct
it empties with bile duct into duodenum at the major duodenal papilla
what is the role of the accessory pancreatic duct
it empties into duodenum at the minor duodenal papilla
What are the parts of the monogastric stomach
- cardiac part
- fundus
- body
- pyloric antrum
- pylorus
what are examples of monogastric species
dog rabbit pig horse human
where is the cardiac part of the monogastric stomach and what is its role
- situated near esophagus
- prevents backflow