In which part of the body does cystic fibrosis predominantly affect function?

Cystic fibrosis predominantly affects the lungs as it is a genetic disorder that leads to the production of thick and sticky mucus. This abnormal mucus buildup primarily obstructs the airways in the lungs, leading to complications such as frequent infections, inflammation, and difficulty in breathing. The condition can also affect the pancreas and the digestive system, but its most significant and noticeable impact is on the respiratory system.

Other areas of the body mentioned, such as the muscles, heart, and kidneys, may experience related complications due to cystic fibrosis, but they are not the primary sites of dysfunction associated with the disease. The hallmark symptoms and complications that most prominently emerge from cystic fibrosis emerge in the lungs, making lung function the most significant concern for individuals with this condition.