INERNAL ILIAC ARTERY S-IV RM32
 LEARNING OBJECTIVES
 By the end of the lecture, the student should be able to:
 • Describe the course of the common iliac artery.
 • Identify divisions of internal iliac by their relationships to pelvic organs
or wall structures.
 COMMON ILIAC ARTERY
 • The left and right common iliac arteries arise from the aorta at the forth
lumber vertebra.
 • The common iliac arteries bifurcate to form the external and internal
iliac arteries
 EXTERNAL ILIAC ARTERY
 • It arises just above the pelvic brim
 • It exits the pelvic cavity below the inguinal ligament and becomes the
femoral artery.
 INTERNAL ILIAC ARTERY
 • It supplies both the visceral and somatic structures of the pelvis
 • It supplies
 Pelvic walls
 Pelvic viscera
 And the perineum
BRANCHES
 • It divides into anterior and posterior divisions
ILIOLUMBER ARTERY
• It courses upward behind the external iliac arteries
 • At the medial border of the psoas major it divides into the lumber and
the iliac branches
The lumber artery supplies the psoas and quaderatus lumbroum , lower
vertebra of lumber region and dural sac
LATERAL SACRAL ARTERY
 • Supplies the region of sacrum.
SUPERIOR GLUTEAL ARTERY
• Largest branch of the internal iliac artery
• It leaves the pelvic cavity through the greater scatic foramen above the
piriformis
• It supplies the portion of the gluteus maximus , medius and minimus and
the hip joint.
ANTERIOR DIVISION
 • Supplies both the somatic and visceral structures.
INFERIOR GLUTEAL ARTERY
• Supplies somatic structures of the buttock
• Inside the pelvic cavity it supplies the portion of the coccygeous muscle,
piriformis and levator ani
• It leaves inferior to the piriformis and supply the hip joint and lateral rotator
muscles.
INTERNAL PUDENDAL ARTERY
• It supplies the somatic structures in the perineum
• It exits the pelvis through the greater sciatic foramen
 • It enters the ischiorectal fossa through the lesser sciatic foramen
OBTURATOR ARTERY
• Supplies the somatic structures in the anterolateral thigh
 OBTURATOR ARTERY
It leaves the pelvis through the obturator canal in the obturator foramen to
supply the proximal portion of the adductor muscles
• It gives artery to the ligamentum teres to the femoral head.
UMBLICAL ARTERY
• Retains a lumen for a short distance from the internal iliac artery
• It gives branches to the urinary bladder
• The superior vesical artery supplies the bladder
 • Medial umbilical ligaments are the remnants of the medial umbilical
artery.
UTERINE ARTERY
• Homologous of deferential artery in the male
• It passes superior to the ureters in the transverse cervical ligament and
ascends within the broad ligaments to reach the uterus
• Tubal to the oviduct
• Vaginal to the vagina
DEFERENTIAL ARTERY
• It supplies the vas deferens and epididymis
 • It passes superior to the ureters and in the inguinal canal to
anastomosis with the spermatic artery
MIDDLE RECTAL ARTERY
• Supplies the rectum
• Anastomosis with the inferior mesenteric artery
• By way of the superior rectal artery and internal pudendal artery through
the inferior rectal artery
INFERIOR VESICAL ARTERY
• Supply the neck of the urinary bladder
• In the male portion of the prostate and seminal vesicle