Final answer:
Atherosclerosis is the condition characterized by abnormal hardening of the walls of the arteries due to factors like smoking and poor diet.
Step-by-step explanation:
After a lifetime of smoking and poor diet, Colin developed abnormal hardening of the walls of his arteries. This condition is called atherosclerosis. Atherosclerosis is a progressive condition characterized by the formation of plaques within the arteries, leading to narrowing and hardening of the arteries. It is primarily caused by a buildup of cholesterol and other fatty substances in the arterial walls. Smoking and an unhealthy diet are major risk factors for the development of atherosclerosis.
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