How does cystic fibrosis affect the person?

Cystic fibrosis can affect individuals in numerous ways. It can cause breathing difficulties, this is because the thick mucus blocks the airways reducing the efficiancy of gas exchange. The mucus can also block the pancreatic ducts, meaning that the pancreatic enzymes can't move into the duodenum and digest food, this produces fibrous cysts. Thirdly the mucus may block sperm ducts and cause infertility. Also, the thick and sticky mucus may trap pathogens, these pathogens may pentrate the epithelial cells and cause infections.