The CCIM Institute, headquartered in Chicago and an affiliate of the National Association of REALTORSÂ®, awards the CCIM designation to individuals who complete a process based both on commercial and investment real estate theory and practice. Weâll review this process in a moment.
The myocardium is the middle muscular layer of the heart's walls and it functions by providing a scaffolding for the heart chambers, assisting in contraction and relaxation of the cardiac walls so that blood can pass between the chambers and electrostimulation conduction through its own tissues and into the epicardium.
The double-layered membrane surrounding the heart is called the  pericardium. The pericardium is a thick,  membranous sac that secretes a lubricating liquid. There is a thinâ¦  inner layer that sits directly on and is attached to the surface of  the heart, called the epicardium.