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  1. Endocardium. This is the smooth innermost layer that keeps blood from sticking to the inside of the heart. Study with Quizlet and memorize flashcards containing terms like Epicardium, Myocardium, Endocardium and more.

  2. The myocardium is the muscular wall of the heart, or the heart muscle. It contracts to pump blood out of the heart and then relaxes as the heart refills with returning blood. Endocardium. The endocardium is the innermost layer of tissue that lines the chambers of the heart.

  3. The heart wall is divided into three layers: epicardium, myocardium, and endocardium. Epicardium: the outer protective layer of the heart. Myocardium: muscular middle layer wall of the heart.

  4. The serous pericardium is composed of two continuous layers that surround the heart. The visceral layer, also known as the epicardium, directly adheres to and lines the heart’s itself, making it the innermost layer of the pericardium and the outermost layer of the heart wall.

  5. The Heart Wall quiz for 9th grade students. Find other quizzes for Other Sciences and more on Quizizz for free!

  6. Layers. The wall of the heart is composed of three layers of unequal thickness. From superficial to deep, these are the epicardium, the myocardium, and the endocardium (see Figure 19.5). The outermost layer of the wall of the heart is also the innermost layer of the pericardium, the epicardium, or the visceral pericardium discussed earlier.

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  8. Nov 3, 2023 · The myocardium is functionally the main constituent of the heart and the thickest layer of all three heart layers. It is a muscle layer that enables heart contractions. Histologically, the myocardium is comprised of cardiomyocytes .

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