Lesson 2B (Part 2) Flashcards
Where is the SMA located? (3)
- Anterior branch
- Inferior to the celiac trunk
- L1 (below transpyloric line)
Where does the SMA course?
Anteroinferiorly
Where do the branches of the SMA supply? (3)
- All of the small intestines
- Cecum and ascending colon
- Most of the transverse colon
Where are the renal arteries located?
Few cm inferior to the origin of the SMA
- upper L2
Where do the renal arteries course?
Horizontally to each kidney
Where does the right renal artery run? (2)
- Posterior to the IVC
2. Anterior to the aorta
Where are the gonadal arteries located?
Just inferior to the renal vessels and descend along the psoas muscle over the external iliac vessels
- lower L2
Where do the gonadal arteries go in males?
Through the inguinal ring to enter the spermatic cord on their way to the testis
Where do the gonadal arteries go in females?
Into the pelvic cavity and continues on the suspensory ligament to supply the ovary
Why does the blood start in the abdomen for the gonadal arteries?
Because the utero testicles stay in the abdomen and once they are born they descend
- need to be at a certain temperature
Where do the 4 paired parietal aortic branches arise?
Posterolateral surface of the aorta along the upper L4 vertebrae
What do the 4 paired parietal aortic branches supply?
The posterolateral abdominal wall
What is the unpaired parietal aortic branch?
Middle/median sacral artery
Where does the median sacral artery arise from?
The posterior surface of the aorta, just proximal to the aortic bifurcation
- L4 and L5
What does the median sacral artery supply?
A portion of the posterior abdominal wall
Where does the aorta bifurcate?
L4
After the aorta bifurcates, what does it turn into?
The left and right common iliac arteries
At L5-S1, what happens to the common iliac arteries?
It divides further into the internal and external iliac arteries
What does the internal ilac artery supply? (3)
The wall and the viscera of…
- Pelvis
- Perineum
- Gluteal region
What is the external iliac artery continuous with?
The femoral artery
What does the external iliac artery supply?
The lower limbs
Why is the internal iliac artery smaller than the external artery?
Because the smaller has less to supply to (viscera and pelvis) compared to the external (lower limbs)
What are the 4 landmark branches of the aorta?
- Celiac trunk
- GDA
- SA
- SMA
What is the celiac trunk a landmark for?
Superior to the pancreas
What is the GDA a landmark for?
Head of the pancreas
What is the SA a landmark for?
Superior to the pancreas
What is the SMA a landmark for?
Inferior to the pancreas
