In
humans, stomach has four parts:
- Cardiac region
- Fundus
- Body or corpus
- Pyloric region.
Cardiac Region
Cardiac
region is the upper part of the stomach where esophagus
opens. The opening is guarded by a sphincter called
cardiac sphincter, which opens only towards stomach.
This portion is also known as cardiac end.
Fundus
Fundus
is a small domeshaped structure.
It is elevated above the level of
esophageal opening.
Body or Corpus
Body
is the largest part of stomach forming about 75% to
80% of the whole stomach. It extends from just below the
fundus up to the pyloric region (Fig. 38.1).
Pyloric Region
Pyloric
region has two parts, antrum and pyloric canal. The
body of stomach ends in antrum. Junction between body
and antrum is marked by an angular notch called incisura angularis. Antrum
is continued as the narrow canal,
which is called pyloric canal or pyloric end. Pyloric
canal opens into first part of small intestine called duodenum. The
opening of pyloric canal is guarded by a sphincter called
pyloric sphincter. It opens towards duodenum.Stomach
has two curvatures. One on the right side is
lesser curvature and the other on left side is greater curvature.
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