Explain why cystic fibrosis shortens time span?

it is due to many complications,but i don't know how to explain it. Please help me
Answers:    cystic fibrosis is caused by a fault in the channel protein affecting the transport of chlorine molecules. This causes excess saline to be lost in sweat and also causes mucus to thicken up :)
. oh it also causes a blockage in the pancreatic duct meaning digestive enzymes grasp stuck in the pancreas and can destroy insulin producing cells this can head to diabetes which in itself can cause death.

Hope this is of some relief
recurrent chest infections damages the lung and weakens the heart beyond repair


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