The celiac artery (celiac trunk) branches from the descending aorta near the opening in the diaphragm. It is a short thick branch of artery about an inch in length and divides into three branches, the gastric, hepatic, and splenic. It supplies the intestines, spleen, and liver. Research Celiac Artery
The celiac ganglia are large clusters of nerve fibres which are related to the sympathetic nervous system. They are located on either side of the aorta, near where the celiac artery begins. Nerves extend from the sympathetic trunk to the celiac ganglia and from there to the stomach, gall bladder, bile ducts, adrenal glands, and further to the inferior and superior mesenteric ganglia, which innervate the intestines. Research Celiac Ganglia
 
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Matt and Leela Probert