The most common cause of biliary ductal obstruction is the presence of ductal. Cyst. Tumor. Stone. Stricture.

answer; i believe the correct answer is (data); /// good luck

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;