Sigmoid arteries
Encyclopedia
The sigmoid arteries, two or three in number, run obliquely downward and to the left behind the peritoneum
and in front of the Psoas major, ureter
, and internal spermatic vessels.
Their branches supply the lower part of the descending colon
, the iliac colon
, and the sigmoid or pelvic colon; anastomosing above with the left colic, and below with the superior hemorrhoidal artery.
Peritoneum
The peritoneum is the serous membrane that forms the lining of the abdominal cavity or the coelom — it covers most of the intra-abdominal organs — in amniotes and some invertebrates...
and in front of the Psoas major, ureter
Ureter
In human anatomy, the ureters are muscular tubes that propel urine from the kidneys to the urinary bladder. In the adult, the ureters are usually long and ~3-4 mm in diameter....
, and internal spermatic vessels.
Their branches supply the lower part of the descending colon
Descending colon
The descending colon of humans passes downward through the left hypochondrium and lumbar regions, along the lateral border of the left kidney....
, the iliac colon
Iliac colon
The iliac colon is situated in the left iliac fossa, and is about 12 to 15 cm. long.It begins at the level of the iliac crest, where it is continuous with the descending colon, and ends in the sigmoid colon at the superior aperture of the lesser pelvis....
, and the sigmoid or pelvic colon; anastomosing above with the left colic, and below with the superior hemorrhoidal artery.