The =œsophagus= is short and nearly straight. It has (according to
Rubeli) a potential caliber of nearly 3 inches (ca. 7 cm.) at either
end, and about 1⁷⁄₁₀ inches (ca. 4.2 cm.) in its middle part.[112] The
muscular coat, except near the cardia, is striated. There are mucous
glands in the submucosa to about the middle of the tube.
[Illustration: