OESOPHAGUS STOMACH
ESOPHAGUS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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as soon as the esophagus starts from the pharynx
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as soon as the trachea is reached
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At the top of the pipe penetration
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sometimes 5 narrows
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only 3 will narrow
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Detailed explanation-1: -The esophagus has 3 constrictions in its vertical course, as follows: The first constriction is at 15 cm from the upper incisor teeth, where the esophagus commences at the cricopharyngeal sphincter; this is the narrowest portion of the esophagus and approximately corresponds to the sixth cervical vertebra.
Detailed explanation-2: -A stricture is an esophageal narrowing, usually 13 mm or less in diameter, that causes dysphagia. The normal esophagus measures up to 30 mm in diameter. Peptic strictures occur usually at the squamocolumnar junction and measure 1–4 cm in length.
Detailed explanation-3: -cervical constriction (narrowest point): due to the cricoid cartilage at the level of C5/6. thoracic constriction: due to the aortic arch at the level of T4/5. abdominal constriction: at the esophageal hiatus at the level of T10/11.
Detailed explanation-4: -Most cases of esophageal stricture are caused by gastroesophageal reflux disease (GERD). In people with GERD the sphincter that closes to keep stomach contents from passing back up into the esophagus does not close properly. Repeated exposure to stomach acid can cause scarring on the esophageal lining.