The muscular tube that connects the throat to the stomach, through which food and liquids pass during swallowing.
From Greek oisophagos, literally meaning 'gullet, what carries food,' from oisein (to carry) and phagein (to eat). The word entered English through New Latin in the 16th century as anatomical terminology was being standardized.
The esophagus performs an incredible feat of engineering - it can push food upward against gravity through coordinated muscle contractions called peristalsis, which is why astronauts can swallow in zero gravity. Ancient Greeks named it perfectly: 'the thing that carries what we eat,' showing their keen observational skills in anatomy.
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