Take the 2-minute tour ×
Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It's 100% free, no registration required.

If a person positions himself upside down and swallows food, will it reach the stomach against gravity? If so how?

share|improve this question
2  
en.wikipedia.org/wiki/Swallowing#Pharyngeal_phase, phase 11. So... yes –  Jan Dvorak Aug 24 '13 at 18:56

1 Answer 1

up vote 2 down vote accepted

The eminent @JanDvorak has basically provided the full answer, but yes, it is possible. You can easily try this yourself, just lean off a bed and swallow something (small) and see what happens. Peristalsis in the esophagus is responsible for moving food down into the stomach. The big proof of this is that astronauts can eat when in space, when weightless. Their food is moved into the stomach just fine.

It's easier to do it upright (peristalsis + gravity) as opposed to upside down (peristalsis - gravity) but definitely quite possible.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.