the.com/esophagus

A muscular elevator that shoves dinner downward whether or not gravity bothers to help.

means The muscular tube that carries swallowed food and drink from the throat down to the stomach.

from From Greek 'oisophagos,' the gullet — traditionally parsed as if from 'oisein' (to carry) plus 'phagein' (to eat), roughly 'that which carries what's eaten,' though the exact build of the word is debated. It reached English via Latin 'oesophagus,' which is why British spelling still keeps the 'oe.'

upside-down test
Astronauts and acrobats can swallow while inverted, no problem
length
Roughly 25 centimeters of disciplined squeezing tube
the gatekeeper
Two ringed valves seal both ends shut
wrong neighbor
Sits right behind the trachea, sharing tight quarters
peristalsis
Muscles ripple in waves to push food down
the.com · every word