Thrapple
The thrapple or hause(-pipe) is the pairt o the gastrointestinal seestem atween the mooth an the painch.
The thrapple is lined wi muscle. This muscle pushes the baw o fuid doun intae the painch. The thrapple can contract or hove for tae allou for the passage o fuid.
| Wikimedia Commons haes media relatit tae Esophagus. |