Basics of Stomach anatomy (for beginners)

1. Stomach
Anatomy of
Stomach
Dr venkatesh Karthikeyan
Email 4852012@GMAIL.COM
10.12.2014

2. Worry is the
Stomach’s
Worst Poison!
-Alfred Nobel

3. Abdominal Part of Esophagus
• It is 1.25 long.
• Enters the abdomen through
the Esophageal opening of the
diaphragm.
• It runs downwards and to the
left in front of the left crus of
the diaphragm, behind the left
lobe of liver.
• It ends by opening into the
cardiac end of stomach.

4. Stomach
• It is the widest and
most distensible part of
the alimentary canal
between the esophagus
and the duodenum.

5. Location
• In the upper left part of
the abdomen occupying
the left hypochondriac,
umbilical and epigastric
regions.
• Extends obliquely from
left hypochondriac region
to epigastric region.
• Most of the stomach lies
under the cover of left
coastal margin and lower
ribs

6. Shape
• It is mostly “J” shaped.
• Its long axis passes
downwards, forward and
to the right and finally
backwards and slightly
upwards.
• It tapers from the fundus
on the left side of the
median plane to the
narrow pylorus to the
right slightly on the
median plane.

7. Variations in shape of Stomach
• It varies greatly
according to the build
of an individual
• Volume
• Position of body
• Phase of respiration

8. Size and Capacity
• Length: 10 inches
• Capacity:
At birth: 30 ml
At puberty: 1 L
Adults: 1.5-2 L

9. Functions of Stomach
• It forms a Reservoir of
food.

10. • It mixes food with
gastric secretions to
form a semifluid
substance called
Chyme.

11. • It controls the rate of
delivery of chyme into
small intestine to allow
proper digestion and
absorption in small
intestine.

12. • HCl secreted by the
gastric glands destroys
the bacteria present in
food and drink.

13. • Castle’s intrinsic factor
present in gastric juice
helps in absorption of
Vitamin B12 in the small
intestine.

14. Thank you 