Barar ku yimaada duleel ama god tubo. Marka ay Koox yihiin waa ampullae.
Waa qayb ballaadhan oo ku jirta dhuun jirka ka mid ah, taas oo qaab buufsan ama wareegsan leh. Meelo badan oo jirka ah ayaa leh ampulla, sida Ampulla of Vater ama Ampulla Mareenka-ugxaanta (Fallopian Tube).