The abdominal aorta originates at the T12 vertebrae and runs downward in front of the lumbar vertebrae, terminating at the L4 vertebrae by dividing into the common iliac arteries. It gives off several unpaired branches including the celiac trunk, superior mesenteric artery, and inferior mesenteric artery. It also provides paired arteries such as the inferior phrenic, suprarenal, renal, gonadal, lumbar, and common iliac arteries that supply the abdominal organs and structures.

1. ABDOMINAL
AORTA
DR SANA YASEEN
ANATOMY DEPARTMENT
KIMS

2. CONTENTS:
Abdominal aorta
IVC
Abdominal part of azygous vein and hemi azygous vein
Lymphnodes and cysterna chylli
Muscles and thoracolumbar fascia
Lumbar plexus and abdominal part of ANS

4. ABDOMINAL
AORTA

5. ORIGIN:
aortic hiatus in the diaphragm at the level of T12
COURSE:
It runs downward retroperitoneal and slightly left in front of
lumbar vertebrae left to inferior vena cava.
ENDS:
Terminates by giving terminal branches at the level of L4
vertebrae.

7. PAIRED
Inferior phrenic artery
Supra renal artery
Renal artery
Gonadal artery
4 lumbar artery
Common iliac artery
UN PAIRED
Coeliac trunk
Superior mesenteric
Inferior mesenteric
Median sacral

8.  Ventral branches
 Lateral branches
 Dorsal branches

9.  Ceiliac trunk/
artery
 Superior
mesenteric artery
 Inferior mesenteric
artery

10. First anterior branch of abdominal aorta.
Originates just below aortic hiatus at level of T12.
Runs 1-3cm and terminates giving;
Left gastric artery
Splenic artery
Common hepatic artery

13. Originates from anterior of abdominal aorta almost 1cm below
coeliac trunk at level of L1 vertebrae
Terminates by anastomosing with ileo-colic artery.
Supplies derivative of midgut
Gives branches:
 Jejunal and ilial branches
 Middle colic
 Right colic
 Ileo colic: further divides into superior and inferior branch

16. Arise from anterior aspect of abdominal aorta at the level of L3 vert.
3-4cm above the bifurcation of aorta.
It continues in sigmoid Mesocolon as superior rectal artery at the level
of S3. it divides into R and L branches and supply rectum. And they
communicate with middle and inferior rectal artery.
Branches:
 Left colic artery
 Sigmoid artery
 Superior rectal artery

19.  Supra renal
vessels
 Renal vessels
 Gonadal vessels
 Phrenic artery

20.  INFERIOR PHRENIC:
 Orginates either from abdominal aorta just above cieliac trunk or directly from cieliac trunk and
occasionally from renal vessels
 Supply diaphragm mainly, also abdominal part of esophagus and supra renal gland.
 SUPRA RENAL ARTERY
 Originates at the level of superior mesenteric artery
 Supplies supra renal gland
 RENAL ARTERY
 Origgginates just below superior mesenteric artery at L1 level
 Right renal is longer than L renal artery
 It supplies kidney and gives branch to supra renal gland.
 GONADAL ARTERY:
 Includes testicular and or ovarian arteries
 Originates little below the origin of renal arteries
 And supplies respective organs

21. Inferior
phrenic
Lumbar
artery
Median sacral

22.  LUMBAR ARTERY
 4 paired arteries arising from aorta opposite bodies of lumbar vertebrae
 Small 5th pair arise from medain sacral or present as branch of iliolumbar
artery
 Supplies vertebral canal, skin of back, muscles
 MEDIAN SACRAL
 Continuation of promitive dorsal aorta
 Originates just above the bifurcation of aorta
 Supplies rectum and anastomose with iliolumbar and lateral sacral
arteries

23. COMMON ILIAC ARTERY
Begin at the level of L4.
Runs downward and laterally
Ends in front of sacroiliac joint to give
 External iliac and internal iliac artery
 Supplies pelvic region and legs.
 Common iliac
artery