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.
Human heart function. The heart circulates blood through two pathways: the pulmonary circuit and the systemic circuit. In the pulmonary circuit, deoxygenated blood leaves the right ventricle of the heart via the pulmonary artery and travels to the lungs, then returns as oxygenated blood to the left atrium of the heart via the pulmonary vein.