the.com/esophagus
A muscular elevator that shoves dinner downward whether or not gravity bothers to help.
upside-down testAstronauts and acrobats can swallow while inverted, no problem
lengthRoughly 25 centimeters of disciplined squeezing tube
the gatekeeperTwo ringed valves seal both ends shut
wrong neighborSits right behind the trachea, sharing tight quarters
peristalsisMuscles ripple in waves to push food down