Branches of Internal Iliac Artery: Introduction

by James Pickering, PhD

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    00:01 In this lecture we are going to look at the branches of the internal iliac artery.

    00:07 We are going to look at the branches that come off this internal iliac artery which is a branch itself from the common iliac. We will look at the some divisions, the anterior and the posterior divisions.

    00:20 And we will look at the visceral and the parietal branches that supply the organs within the pelvis and also the body wall, the walls of the pelvis.

    00:30 We will look at some specific organs, so we'll look at the male reproductive organs, and to the testes. We will look at the female reproductive organs like the uterus and the vagina and the specific branches that supply them. And at the end we will look at the rectum which has a complicated blood supply. And we will start looking at the blood supply to it with the upper, middle and lower parts. But important, remember, the rectum also with the anus runs in the perineum and we will look at that later on in the course.

    01:04 So the main arterial supply to the pelvic viscera is primarily from the internal iliac artery.

    01:11 And this artery gives rise to a complex and incredibly variable network of arteries that supply organs within the urinary, reproductive and gastrointestinal systems. Those systems that are located in the pelvis.

    01:28 So if we look at the general arrangement of the branches of the internal iliac, then on screen we can see a hemisected pelvis which has had the organs removed.

    01:42 So we're just looking into a right hemisected pelvis. You should be familiar with this view now. Here we have...

    01:50 Here we have the posterior aspect. Here we have the anterior aspect.

    01:54 We can see we have got the sacrum, we have got the 5th lumbar vertebrae here.

    01:59 We have got the pubic symphysis. But the bladder, the rectum, the uterus, the vagina have all been removed.

    02:07 And what should be remembered is, that running down through the abdomen was the abdominal aorta giving rise to those unpaired visceral branches that supply the foregut, midgut and hindgut, the coelic trunk, superior mesenteric artery and inferior mesenteric artery.

    02:26 And then as it entered into the pelvis, the aorta which we can see here bifurcated into two. It bifurcated into the left, which we can see here that's been cut, and the right common iliac artery and this occurred at around about the level of the 4th lumbar vertebrae so about here.

    02:47 If we now just follow the right common iliac which we can see running down here, we see the right common iliac itself divides into two.

    02:55 It divides into an external iliac and an internal iliac.

    03:00 I will concentrate on the internal iliac but its just worth remembering that the external iliac passing down in this direction will go on to form the femoral artery and supply the lower limb; but also coming up from the external iliac artery, we have the inferior epigastric artery.

    03:20 And remember the inferior epigastric artery was important in providing arterial blood to the muscles of the anterior abdominal wall.

    03:29 It would go onto anastomose with the superior epigastric artery which was a branch form internal thoracic artery in the chest.

    03:38 So try to remember that formation of that collateral circulation But let's just concentrate on the internal iliac artery.

    03:48 So here we can see the internal iliac that's passing down over the pelvic brim into the pelvis.

    03:55 And what we can see is that we have a whole series of branches.

    04:00 And in the cadaver these branching patterns are incredibly variable.

    04:05 But they do tend to divide themselves into what's known as an anterior division and the posterior division, so let's have a look.

    About the Lecture

    The lecture Branches of Internal Iliac Artery: Introduction by James Pickering, PhD is from the course Pelvis.

    Included Quiz Questions

    1. L4
    2. L5
    3. L3
    4. L2
    5. L1
    1. Internal thoracic artery
    2. Inferior mesenteric artery
    3. Femoral artery
    4. External iliac artery
    5. Internal iliac artery
    1. Inferior epigastric artery
    2. Internal pudendal artery
    3. Median sacral artery
    4. Inferior vesical artery
    5. Iliolumbar artery

    Author of lecture Branches of Internal Iliac Artery: Introduction

     James Pickering, PhD

    James Pickering, PhD

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