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abdominal aorta

abdominal part of aorta

The largest artery in the abdominal cavity, the abdominal aorta is the distal part of the descending aorta and a direct continuation of its thoracic portion. Its significance lies in the number of major branches it gives off along a short course: the inferior phrenic arteries, the lumbar arteries, the median sacral artery, the superior and inferior mesenteric arteries, the middle suprarenal arteries, the renal arteries, the testicular or ovarian arteries, and the celiac trunk. Between them these vessels supply the diaphragm, the posterior abdominal wall, the gut, the adrenal glands, the kidneys, and the gonads, so the abdominal segment of the aorta functions as the distribution point for most of the visceral arterial supply below the diaphragm.

Abdominal part of aorta: the distal part of the descending aorta, which is the continuation of the thoracic part and gives rise to the inferior phrenic, lumbar, median sacral, superior and inferior mesenteric, middle suprarenal, renal, and testicular or ovarian arteries, and celiac trunk[BTO]. The abdominal aorta is the largest artery in the abdominal cavity. As part of the aorta, it is a direct continuation of descending aorta(of the thorax). [WP,unvetted].

On this page
Typ Vessel
Körpersystem Cardiovascular
Übergeordnete Struktur section of aorta
Lateinischer Name abdominal part of aorta
FMA ID 3789

Frequently Asked Questions

What is the abdominal aorta?

The abdominal aorta (known in anatomical terminology as abdominal part of aorta) is the largest artery in the abdominal cavity. It is a continuation of the thoracic (descending) aorta and supplies oxygenated blood to most of the abdominal organs, the pelvis, and the lower limbs.

Where is the abdominal aorta located?

The abdominal aorta runs vertically along the midline of the abdomen, lying just in front of the lumbar vertebral column. It begins at the aortic hiatus of the diaphragm and ends by dividing into the two common iliac arteries at approximately the level of the fourth lumbar vertebra.

What is the function of the abdominal aorta?

The abdominal aorta distributes oxygenated blood to the abdominal organs through major branches including the celiac trunk, superior and inferior mesenteric arteries, renal arteries, and gonadal arteries, as well as to the diaphragm, lumbar muscles, and pelvic structures.

What conditions can affect the abdominal aorta?

The most clinically significant condition affecting the abdominal aorta is an abdominal aortic aneurysm (AAA), in which the vessel wall weakens and balloons outward, risking life-threatening rupture. Atherosclerosis and aortic dissection can also affect this structure.

How is the abdominal aorta different from the thoracic aorta?

While both are segments of the same aorta, the thoracic aorta supplies the chest organs and upper body structures, whereas the abdominal aorta supplies the abdominal viscera and lower extremities. The abdominal portion begins after the aorta passes through the diaphragm.

References

  1. Foundational Model of Anatomy — FMA:3789 Reference anatomy ontology (University of Washington)
  2. UBERON — UBERON:0001516 Cross-species anatomy ontology (EMBL-EBI Ontology Lookup Service)
  3. Wikidata — Q2264329 Structured knowledge base cross-reference
  4. Wikipedia — abdominal aorta Encyclopedia article (verified cross-reference)

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Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.