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Median sacral artery.<br />
Its arises from the back of the lower end of<br />
Abdominal aorta just above its bifurcation<br />
Its descends in the median plane over<br />
the 4th and 5th lumbar vertebrae.<br />
It ends in a fibro-cellular mass in front<br />
of the coccyx known as glomus coccygeum.<br />
Branches:<br />
The 5 -<br />
th pair of lumbar arteries1<br />
Twigs to the sacrum. -<br />
Twigs to the rectum and anal canal-