Ma'anar ƙamus na kalmar "beta cell" tana nufin wani nau'in tantanin halitta da ake samu a cikin pancreas wanda ke samar da insulin, hormone wanda ke taimakawa wajen daidaita matakan glucose a cikin jini. Kwayoyin Beta suna cikin tsibiran Langerhans, waɗanda gungu ne na sel a cikin pancreas waɗanda ke samar da hormones da ke cikin daidaita matakan sukarin jini. Rashin aiki ko lalata ƙwayoyin beta na iya haifar da haɓakar ciwon sukari.