Respiratory system and the cardiovascular system
Because the world rotates around and God the creator changed up the earth that's the biblical answer but a scientific answer would be due to himans
Genetics is the strongest known factor after gender and age. Genetics is one of the strongest factors in, if not all, many types of cancer.
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B.) Angioplasty
An angioplasty is when the blood vessel can be widened by a balloon that is blown up in the blood vessel and sometimes a stent is put in place to keep it open.