Anatomy of ( stomach ) digestive system

NOTES NURSING & MEDICAL STUDENTS Notes for medical studentand nursing student

stomach

introduction::

-The stomach is the dilated portion of the alimentary canal .

-it is situated in the upper part of the abdomen.

-the extending from beneath the left costal margin rigion into the epigastric and umblical regions.

-much of the stomach lies under cover of the lower ribs .

-the stomach relatively fixed at both ends but is very mobile in between.

structure of the stomach:-

-the stomach is J shaped organ

-two opening the stomach ,cardiac and pyloric orifices.

-two curvatures,the greater and lesser curvatures .

-two surfaces ,anterior and posterior surfaces .

Relations of the stomach:

1) anterior relations :-

-anterior abdominal

-left costal margin

-left pleura and lung

-diaphragm

-left lobe of the liver

2)posterior relations :-

-lesser sac

-diaphragm

-spleen

-left suprarenal gland

-splenic artery

-pancreas

part of stomach:

1) fundas-

2)body -

3)pyloric -

4)pylorus-

1)fundas ---

-this is dome shaped and projrcts upwadrd and to the left of the cardiac orifice.

2) body---

-this extends from the level of the cardiac orifice to the level of the incisura angulinris , a

constant notch in the lower part of the lesser curvature.

3)pyloric--

-Extends from the incisura angularis to the pylorus

4) pylorus

blood supply of stomach:-

1)left gastric artery-

- arises from the celiac artery .it supplies the lower third of the esophagus and the upper

right part of the stomach.

2) right gastric artery :-

-arises from the hepatic artery at the upper border of the pylorus and supplies the lower

right part of the stomach .

3)short gastric arteries:-

-arise from the splenic artery and supply fundas of the stomach .

4) left gastroepiploic artery:-

-arise from splenic artery and supply the greater curvaturecurvature.

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