Stents are metallic cages that hold open a coronary artery after angioplasty. Metallic objects placed in the body can pose problems for MRI scans, which use a strong magnetic field and pulses of radio waves to see inside the body. The magnetic field could dislodge the object, while radio waves could make it heat up.
The Cardiovascular System: The Heart. I. Introduction. A. The major function of the cardiovascular system is to circulate substances throughout. the body. In other words, its organs function to supply cells and tissues with oxygen. and nutrients and also to remove wastes, CO. 2. and urea, from cells and tissues.
The mammalian heart is a muscle, the fundamental function of which is to pump blood throughout the circulatory system to deliver oxygen and nutrients to organs and to transport carbon dioxide back to the lungs.