Anatomy Of ESOphagus Flashcards
Define esophagus
Is a collapsible muscular tube that conveys food
from pharynx to stomach
Esophagus Extends from the————-
to——————
Esophagus
lower border of cricoid cartilage (C6)
To
gastro-esophageal junction
Esophagus Passes through
neck, thorax (enters the superior
mediastinum and then the posterior mediastinum), and
abdomen
Esophagus Lies between the——- anteriorly and the ———posteriorly
trachea
vertebral
column
Esophagus Pierces the diaphragm through
opening called the
esophageal hiatus
Esophagus ends in the
superior portion of
the stomach
Food passes through the esophagus rapidly because of
the peristaltic action of its musculature, aided by but
not dependent on gravity (one can still swallow if
inverted).
In the neck- esophagus is related to-
Anterior
trachea, thyroid,
recurrent laryngeal nerves
In the neck- esophagus is related to-
On each side:
thyroid lobes
In the neck- esophagus is related to
Left side:
thoracic duct
Thoracic esophagus passes through the ————in
the right crus of diaphragm at—- level (to the left of median plane) and becomes the abdominal part of the esophagus
esophageal hiatus ,T10
Esophagus - Thoracic
Anterior relationship
Trachea, right pulmonary artery, pericardium, left atrium, and left bronchus
Esophagus - Thoracic
Posterior relationship
Vertebral column,
thoracic duct,
azygos vein,
thoracic aorta
Esophagus Is attached to the margins of the esophageal hiatus in the diaphragm
by
phrenicoesophageal ligament
phrenicoesophageal ligament is an
extension of inferior diaphragmatic fascia.
phrenicoesophageal ligament connects
the esophagus flexibly to the diaphragm;
phrenicoesophageal ligament Limits?
while permitting?
upward movement of the esophagus
some movement during swallowing and respiration.(independent movement of the diaphragm and
esophagus during respiration and swallowing.)
Awareness of Natural constrictions
is important why?
when passing instruments through esophagus
when viewing radiographs of patients who are experiencing dysphagia (difficulty in swallowing).
Constrictions are the common sites of
cancer
Natural constrictions
Are
Cervical constriction
Thoracic (broncho-aortic) constriction
Diaphragmatic constriction
Cervical constriction:
caused by
cricopharyngeus muscle;
Cervical constriction:
referred to clinically as the
upper esophageal sphincter.
Cervical constriction located
at its beginning at the pharyngoesophageal junction, approximately 15 cm from the incisor teeth;
Thoracic (broncho-aortic) constriction:
Is a ——— constriction
compound
Thoracic (broncho-aortic) constriction:
a compound constriction where it is first crossed by?
Then?
1-arch of the aorta, 22.5 cm from the incisor teeth
2-is crossed by left main bronchus, 27.5 9 inch
cm from the incisor teeth
Diaphragmatic constriction:
where it passes through the
esophageal hiatus of the
diaphragm, approximately 40 cm from the incisor teeth.
Abdominal Esophagus
——— shaped ,
Is about 40 cm from the incisor teeth in adult.
Trumpet
Abdominal Esophagus
Is slightly broader at the——- than at the diaphragmatic aperture.
cardiac orifice
Abdominal Esophagus
Lies to the left of the midline behind ———and enters
abdomen through———-(formed by the two diaphragmatic
crura) at T10
left 7th costal cartilage
esophageal hiatus
Abdominal Esophagus
Runs obliquely to the left and slightly posteriorly, andends at
————at—— (continuous with cardiac orifice of
stomach).
gastroesophageal junction T11
Abdominal Esophagus
Lies posterior to
left lobe of the liver
Abdominal Esophagus
Lies ant to
left crus, left inferior
phrenic vessels and left greater and lesser splanchnic nerves
