QS Study

The stomach is a reservoir of food particles, where digestion begins. It is the internal organ in which the major part of the digestion of food occurs, being (in humans and many mammals) a pear-shaped enlargement of the alimentary canal linking the esophagus to the small intestine. It is a muscular J-shaped pouch like hollow organ that hangs inferior to the diaphragm in the upper left portion of the abdominal cavity.

Parts of stomach

Fig – Parts of stomach

It is divided into two pans:

(A) Cardiac part: The cardiac is a small area near the esophageal opening.

It Subdivided into – (i) Fundus, and (ii) Body.

(B) Pyloric part: This part secretes two types of mucus and the hormone gastrin.

It subdivided into – (i) Pyloric antrum, (ii) Pyloric canal, (iii) Pylorus.

Blood supply

Arterial supply:

(i) The left gastric artery, a branch of the coeliac trunk;

(ii) The right gastric artery, a branch of the common hepatic artery;

(iii) The right gastroepiploic artery, a branch of the gastroduodenal artery;

(iv) The left gastroepiploic artery, a branch of the splenic artery;

(v) 5 to 7 short gastric arteries, branch of the splenic artery.

Venous drainage

The veins of stomach drain into:

a) Portal vein.

b) Superior mesenteric vein.

c) Splenic vein.