Internal iliac arteries branch from:

Question

BlackTom AI · Accepted Answer

1. Relevant knowledge points and concepts
The abdominal aorta ends by bifurcating into the right and left common iliac arteries at approximately the level of the fourth lumbar vertebra (L4). Each common iliac artery then divides into an internal iliac artery (also called the hypogastric artery) and an external iliac artery near the pelvic brim. The internal iliac supplies pelvic viscera, pelvic walls, and gluteal regions; the external iliac continues into the lower limb as the femoral artery.

2. Complete reasoning process, step by step
- Start at the abdominal aorta: it travels caudally and at L4 splits into two common iliac arteries.  
- Follow one common iliac artery toward the pelvis; as it approaches the pelvic brim, it divides into two terminal branches.  
- Those two terminal branches are the internal iliac artery (medial/deep toward pelvis) and the external iliac artery (lateral/continuing to the lower limb).  
- Therefore the internal iliac artery originates from the common iliac artery.

3. Calculations
No numeric calculations are needed for this anatomical relationship.

4. Why the correct answer is correct
Because anatomically the internal iliac artery is a terminal branch of the common iliac artery (often termed the hypogastric), arising when the common iliac bifurcates at the pelvic brim. This is the standard anatomical description taught in gross anatomy and surgical texts.

5. Why the other options are incorrect
- The thoracic aorta: this is the superior portion of the aorta in the thorax; it does not directly give rise to iliac arteries.  
- The external iliac arteries: these are sibling branches of the internal iliac, not their parent; the internal and external both arise from the common iliac.  
- The abdominal aorta: it gives rise to the common iliac arteries by bifurcation; it does not directly branch into internal iliac arteries without first forming the common iliacs.

6. Conclusion confirming the answer
Thus, the internal iliac arteries branch from the common iliac arteries. This matches the provided correct answer: The common iliac arteries.

Internal iliac arteries branch from:Single choice

Similar Questions

If I have scheduled a holiday or employment during the University exam period which coincides with the date of the final exam, then

When is the final exam?

If I sit for the final exam, but feel like I could have done better, then

What pieces of assessment are due after Week 10?

True or False? Although I will attempt to submit online assessments early, if I experience a technical issue with the submission of online assessments that prevents me from submitting an assignment, I should follow the UNSW special consideration guidelines.

The essay

When is the essay due?

Details of the essay question will be released in the Assessments Hub

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler