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  1. www.kenhub.com › anatomy › layers-of-the-heartLayers of the heart: Epicardium, myocardium, endocardium - Kenhub

    Nov 3, 2023 · The heart is a muscular organ found in the middle mediastinum that pumps blood throughout the body. It is housed in the pericardial sac, which protects it and assists with its mechanics. Recalling from the heart anatomy, it has two atria and two ventricles that make up elements and important steps for the heart cycle.

    • Heart Valves Anatomy

      The atrialis layer is the most cranial and is directed...

    • Pericardium

      The pericardium is the membrane that encloses the heart and...

    • Oral Cavity

      Oral cavity. The oral cavity is situated anteriorly on the...

    • Conduction System

      Anterior, middle, posterior ... Here it lies in the...

  2. www.thoughtco.com › the-heart-wall-4022792The 3 Layers of the Heart Wall - ThoughtCo

    • 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.

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  4. microbenotes.com › layers-of-the-heartLayers of the Heart: Epicardium, Myocardium, Endocardium

    Aug 4, 2023 · Myocardium (Middle Layer of Heart) Myocardium is the middle thickest muscular layer made up of cardiomyocytes. It is responsible for the contraction and relaxation actions of the heart.

  5. www.kenhub.com › en › libraryMyocardium: definition, structure and function | Kenhub

    Oct 30, 2023 · The myocardium is the middle muscular layer of the heart. It is the thickest layer which lies between the single-cell endocardium layer, and the outer epicardium, which makes up the visceral pericardium that surrounds and protects the heart.

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  6. med.libretexts.org › Bookshelves › Anatomy_and17.1C: Layers of the Heart Walls - Medicine LibreTexts

    The middle layer of the heart wall is the myocardium—the muscle tissue of the heart and the thickest layer of the heart wall. It is composed of cardiac muscle cells, or cardiomyocytes. Cardiomyocytes are specialized muscle cells that contract like other muscle cells, but differ in shape.

  7. www.nhlbi.nih.gov › health › heartHow the Heart Works - What the Heart Looks Like - NHLBI, NIH

    Mar 24, 2022 · Myocardium is the thick middle layer of muscle that allows your heart chambers to contract and relax to pump blood to your body. Pericardium is the sac that surrounds your heart. Made of thin layers of tissue, it holds the heart in place and protects it.

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  9. www.ncbi.nlm.nih.gov › books › NBK535355Anatomy, Thorax, Cardiac Muscle - StatPearls - NCBI Bookshelf

    Aug 8, 2023 · Cardiac muscle (or myocardium) makes up the thick middle layer of the heart. It is one of three types of muscle in the body, along with skeletal and smooth muscle. The myocardium is surrounded by a thin outer layer called the epicardium (AKA visceral pericardium) and an inner endocardium.

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