Peristalsis
When I think Peristalsis, I think Spastic! lol, seriously!
Peristalsis is the involuntary movement in the oesophagus, to help push food down the throat.
So.. it is kinda like a spastic, but... with a good function.
- circular muscle contracts
- longitudinal muscles relaxes
wall -> constricts
---> becomes narrower but longer
- longitudinal muscles contracts
- circular muscles relaxes
wall -> dilated
---> widens lumen for food to enter
Simple acronym: CCLR (circular contracts, longitudinal relax)
Interesting etymology note:
The word is derived from New Latin and comes from the Greek peristaltikos, peristaltic, from peristellein, "to wrap around," and stellein, "to place."
posted by Danial @ 11:27 PM
3 comments
3 Comments:
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