Guide To The Structure Of The Heart

Heart Wall

The heart wall has three layers. In addition to protecting the heart, the heart wall coordinates synchronization of the heartbeat and enables the heart to contract. The wall is composed of cardiac muscle, connective tissue, and endothelium. Known as the epicardium or visceral pericardium, the outer layer of the heart wall forms the inner layer of the pericardium, a sac that surrounds and protects the heart. The majority of the epicardium is formed of connective tissues, including fat. Coronary blood vessels located in the epicardium supply the heart wall with blood, and the epicardium also helps in the production of pericardial fluid. The myocardium is the middle layer of the heart wall, and it is also the thickest layer. This part of the heart wall is constructed of cardiac muscle that stimulates heart contractions. The endocardium is the innermost layer of the heart wall, and it is the thinnest of all the layers. It serves as a protective covering for the valves of the heart, and also acts as a lining for the heart chambers. Endocarditis, an infection of the endocardium, is one of the major issues that could arise in this area of the heart.

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