Bieżący numer

Archiwum

Funkcjonalność wola w przypadku drobiu
Bartosz Kierończyk, Mateusz Rawski Jakub Długosz, Sylwester Świątkiewicz, Damian Józefiak

Wole (Ingluvies) stanowi uwypuklenie przełyku (Esophagus). W zależności od swojej budowy anatomicznej klasyfikowane jest jako wole rzekome (blaszkodziobe, Anseriformes) tj. krótkie, zajmujące małą przestrzeń, lub prawdziwe (ptaki grzebiące, Galliformes) –obszerne i dobrze wykształcone. Podstawową funkcją tego narządu jest magazynowanie pokarmu, jego zwilżanie oraz poddawanie treści pokarmowej procesom trawiennym, wynikającym z refluksu soku żołądkowego oraz maceracji i fermentacji mikrobiologicznej. Wypełnienie wola jest ściśle uzależnione od objętości pokarmu w dwuczęściowym żołądku (Proventriculus, Ventriculus), którego pojemność w przypadku kurcząt, szacuje się na maksymalnie 5-10g paszy. Gdy narząd ten wypełni się całkowicie następuje przechowywanie pokarmu w wolu. W momencie opróżnienia mielca, skurcze mięśniówki powodują pasaż treści do dalszych odcinków przewodu pokarmowego (Langenfeld, 1992). Z powyższych względów można przyjąć, że funkcje obydwu narządów są ściśle połączone i wpływają na perystaltykę dalszych odcinków układu pokarmowego.
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