Answer the following question given this paragraph: When a blood vessel gets clogged, there is no medical equivalent of "Drano" that will clear it out. There is, however, a procedure known as angioplasty. A thin tube with a balloon is threaded through the blood vessels. Once in place, the balloon is inflated to compress the clog against the artery wall. Q: The procedure known as angioplasty is used when what part of the circulatory system is clogged? Choices: - lungs - the heart - the spinal cord - blood vessel A:
blood vessel