Cholangiocarcinoma is a rare cancer found in the tissue of the bile ducts, occurring in approximately two out of 100,000 people. Men and women are equally affected and most cases occur in people over age 65. The bile duct is a small tube that connects the liver and gallbladder to the small intestine. The ducts carry bile -- the liquid that helps break down fat in food during digestion â out of the liver. Tumors can develop anywhere on the bile ducts and are typically slow growing.
Soil formation is a long slow process. It's estimated that an inch of soil takes 500 to 1000 years to form. Soil is constantly being formed. It is also constantly being eroded.
Report Abuse. soil is formed due to weathering of ROCKS this process takes a lot of time different ways by which soil is formed are:- 1. During the rains water gets collected in the rocks. as the winters arrive the water freezes and creates cracks witihn the rock. 2. Differtent plant seeds grow on the rocks.