Esophagus has 3 constrictions :
1) Cervical constriction :
of the
beginning
~
At the
pharyngoesophageal
junction . Caused by the circopharyngeus muscle .
2) Thoracic constriction broncho aortic
is first
Where the
esophagus crossed by
~
the arch of aorta & left main bronchus .
3) Diaphragmatic constriction :
the
Where the
esophagus
~
passes through
esophageal hiatus of the diaphragm .
Abdominal Part of
Esophagus :
Only 1 25 longa from
~
the
esophageal
cm
passes
.
·
Awareness of these constrictions is important ; hiatus in the
right crus of the
diaphragm to the
When the instruments Cardial cardiac orifice of the stomach
.
passing through the esophagus
into the stomach; ~
It's anterior surface is covered with peritoneum
of the
when
viewing radiographs of patients who are
greater
sac & continuous to cover the
experiencing dysphagia . anterior surface of the stomach
.
~
It also fits into the posterior
n u m a
groove on
follows surface of liver
The
esophagus the of the vertebral column the
~
curve .
it passes & mediastinum
as
through the neck .
Muscle Layers It's posterior surface is covered with peritoneum of
circular
internally Longitudinal externally
~
&
are
.
Types of muscle in external of the omental Bursa & continuous to the posterior
~
layer esophagus
: cover
Superior third :
voluntary stricted muscle surface of the stomach .
Inferior third : It's border is continuous with the lesser
right
~
Smooth muscle
Middle third : Both types
. curvature of the stomach
.
~
It's left border is separated from the fundus of
The
esophagus
~
hiatus the cardiac notch between the
passes through the
esophageal stomach by the esophagus
& fundus
in the muscular
right crus of the
diaphragm . .
by entering The is located to the left of theT11
It terminates the stomach at the cardial.
esophagastric junction
~
vertebra & is marked by -line, where the
orifice of .
the stomach a
lining of
to the stomach
It is encircled by the
esophageal plexus distally
. the
esophagus changes lining.
~
-
1) Cervical constriction :
of the
beginning
~
At the
pharyngoesophageal
junction . Caused by the circopharyngeus muscle .
2) Thoracic constriction broncho aortic
is first
Where the
esophagus crossed by
~
the arch of aorta & left main bronchus .
3) Diaphragmatic constriction :
the
Where the
esophagus
~
passes through
esophageal hiatus of the diaphragm .
Abdominal Part of
Esophagus :
Only 1 25 longa from
~
the
esophageal
cm
passes
.
·
Awareness of these constrictions is important ; hiatus in the
right crus of the
diaphragm to the
When the instruments Cardial cardiac orifice of the stomach
.
passing through the esophagus
into the stomach; ~
It's anterior surface is covered with peritoneum
of the
when
viewing radiographs of patients who are
greater
sac & continuous to cover the
experiencing dysphagia . anterior surface of the stomach
.
~
It also fits into the posterior
n u m a
groove on
follows surface of liver
The
esophagus the of the vertebral column the
~
curve .
it passes & mediastinum
as
through the neck .
Muscle Layers It's posterior surface is covered with peritoneum of
circular
internally Longitudinal externally
~
&
are
.
Types of muscle in external of the omental Bursa & continuous to the posterior
~
layer esophagus
: cover
Superior third :
voluntary stricted muscle surface of the stomach .
Inferior third : It's border is continuous with the lesser
right
~
Smooth muscle
Middle third : Both types
. curvature of the stomach
.
~
It's left border is separated from the fundus of
The
esophagus
~
hiatus the cardiac notch between the
passes through the
esophageal stomach by the esophagus
& fundus
in the muscular
right crus of the
diaphragm . .
by entering The is located to the left of theT11
It terminates the stomach at the cardial.
esophagastric junction
~
vertebra & is marked by -line, where the
orifice of .
the stomach a
lining of
to the stomach
It is encircled by the
esophageal plexus distally
. the
esophagus changes lining.
~
-
