In the horse, the oesophageal lumen narrows at the thoracic inlet and oesophageal hiatus of the diagphragm; this predisposes them to impaction (choke). Another species difference is that striated muscle exists only in the rostral 65% of the oesophagus.
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==Stomach==
==Stomach==
[[Image:Margo Plicatus.jpg|thumb|right|250px|Equine Stomach with Margo Plicatus - Copyright RVC 2008]]
[[Image:Margo Plicatus.jpg|thumb|right|250px|Equine Stomach with Margo Plicatus - Copyright RVC 2008]]