Answer
The stomach has a dual innervation . Sympathetic nerves reach it from the celiac ganglion. Its parasympathetic innervation derives from the Vagus nerve
Work Step by Step
The arterial blood supply of the stomach is derived from branches of the celiac trunk.:
Abdominal aorta gives off the celiac trunk just below the aortic hiatus.. The celiac trunk branches into the common hepatic artery, the left gastric and the splenic arteries. Later the common hepatic artery gives off gastroduodenal and the hepatic artery proper . The hepatic artery proper gives of a right gastric artery branch to the stomach. The left gastric artery anastamoses with the right gastric and tis combination supplies blood to the stomach, lower esophagus and duodenum
The venous drainage ;
Blood from the stomach goes by way of hepatic circulation to the inferior vena cava to the heart.
The hepatic portal system drains the digestive system,, pancreas , spleen and gallbladder.
In the portal system the blood passes through two capillary beds in series before reaching the vena cava and the heart. This means that capillaries are connected absent veins; Some of the capillaries for example those in the liver ( sinuses) are modified in shape, and are highly permeable The hepatic portal system gives the liver the advantage of first obtaining absorbed nutrients . This arrangement also allows bacteria, toxins, and foreign bodies-- picked up by the digestive system-- to be killed or neutralized by the liver, and not get into the systemic circulation.
The superior mesenteric vein from the digestive tract , joins the splenic vein to form the hepatic portal vein The hepatic portal vein receives the cystic vein from the gall bladder then enters the liver, at its inferior surface and breaks up into capillaries that lead into many sinusoids. Blood from hepatic sinusoids empties into the hepatic veins which lead to the inferior vena cava. Left and right gastric veins also empty into the portal vein
