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  1. Nov 3, 2023 · This article will discuss the layers of the heart (the epicardium, the myocardium and the endocardium) and any clinical relations pertaining to them. In the same way that vehicles have their fuel pumps, our body has the heart.

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    • Regina Bailey
    • Epicardium. Epicardium (epi-cardium) is the outer layer of the heart wall. It is also known as visceral pericardium as it forms the inner layer of the pericardium.
    • Myocardium. Myocardium (myo-cardium) is the middle layer of the heart wall. It is composed of cardiac muscle fibers, which enable heart contractions. The myocardium is the thickest layer of the heart wall, with its thickness varying in different parts of the heart.
    • Endocardium. Endocardium (endo-cardium) is the thin inner layer of the heart wall. This layer lines the inner heart chambers, covers heart valves, and is continuous with the endothelium of large blood vessels.
  2. The heart wall is composed of three layers: the epicardium, myocardium, and endocardium. Location of the heart in the mediastinum. The superficial epicardium is the visceral layer of the serous pericardium.

  3. Jan 4, 2024 · The heart wall itself can be divided into three distinct layers: the endocardium, myocardium, and epicardium. In this article, we shall look at the anatomy and clinical relevance of these layers.

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    • Location of the Heart. The human heart is located within the thoracic cavity, medially between the lungs in the space known as the mediastinum. Figure 19.2 shows the position of the heart within the thoracic cavity.
    • Shape and Size of the Heart. The shape of the heart is similar to a pinecone, rather broad at the superior surface and tapering to the apex (see Figure 19.2).
    • Chambers and Circulation through the Heart. The human heart consists of four chambers: The left side and the right side each have one atrium and one ventricle.
    • Membranes, Surface Features, and Layers. Our exploration of more in-depth heart structures begins by examining the membrane that surrounds the heart, the prominent surface features of the heart, and the layers that form the wall of the heart.
  4. The heart wall is comprised of three layers: the outer epicardium, the middle myocardium, and the inner endocardium.

  5. Describe the internal and external anatomy of the heart. Identify the tissue layers of the heart. Relate the structure of the heart to its function as a pump. Compare systemic circulation to pulmonary circulation. Identify the veins and arteries of the coronary circulation system.

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