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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.
- Heart Valves Anatomy
Understanding heart valves anatomy is important in grasping...
- Pericardium
Between the layers is the pericardial cavity, a potential...
- Oral Cavity
Oral cavity. The oral cavity is situated anteriorly on the...
- Conduction System
[Conduction system of the heart]The physiological pacemaker...
- Structure, Valves, Coronary Vessels
The cusps are pushed open to allow blood flow in one...
- Cardiac Muscle Tissue Histology
Cardiac muscle tissue, also known as myocardium, is a...
- Ventricles
The definition of heart ventricles can be summed up as the...
- Atria
Basic anatomy of the heart. The heart is at the center of...
- Heart Valves Anatomy
Jul 26, 2024 · The three 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. Endocardium: the inner layer of the heart.
- Regina Bailey
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 19.1.3). 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.
- Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Mat...
- 2019
The heart wall is comprised of three layers: the outer epicardium, the middle myocardium, and the inner endocardium.
- Location of The Heart
- Everyday Connection
- Shape and Size of The Heart
- Chambers and Circulation Through The Heart
- Membranes, Surface Features and Layers
- Membranes
- Disorders of The Heart: Cardiac Tamponade
- Surface Features of The Heart
- Layers
- Internal Structure of The Heart
The human heart is located within the thoracic cavity, medially between the lungs in the space known as the mediastinum. Figure 6.1.1 shows the position of the heart within the thoracic cavity. Within the mediastinum, the heart is separated from the other mediastinal structures by a tough membrane known as the pericardium, or pericardial sac, and s...
CPR The position of the heart in the torso between the vertebrae and sternum (see Figure 6.1.1 for the position of the heart within the thorax) allows for individuals to apply an emergency technique known as cardiopulmonary resuscitation (CPR) if the heart of a patient should stop. In adults, pressure is applied with the flat portion of one hand on...
The shape of the heart is similar to a pinecone, rather broad at the superior surface and tapering to the apex (see Figure 6.1.1). A typical heart is approximately the size of your fist: 12 cm (5 in) in length, 8 cm (3.5 in) wide, and 6 cm (2.5 in) in thickness. Given the size difference between most members of the sexes, the weight of a female hea...
The human heart consists of four chambers: The left side and the right side each have one atrium and one ventricle. Each of the upper chambers, the right atrium (plural = atria) and the left atrium, acts as a receiving chamber and contracts to push blood into the lower chambers, the right ventricle and the left ventricle. The ventricles serve as th...
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. Each of these components plays its own unique role in terms of function.
The membrane that directly surrounds the heart and defines the pericardial cavity is called the pericardium or pericardial sac. It also surrounds the “roots” of the major vessels, or the areas of closest proximity to the heart. The pericardium, which literally translates as “around the heart,” consists of two distinct sublayers: the sturdy outer fi...
If excess fluid builds within the pericardial space, it can lead to a condition called cardiac tamponade, or pericardial tamponade. With each contraction of the heart, more fluid—in most instances, blood—accumulates within the pericardial cavity. In order to fill with blood for the next contraction, the heart must relax. However, the excess fluid i...
Inside the pericardium, the surface features of the heart are visible, including the four chambers. There is a superficial leaf-like extension of the atria near the superior surface of the heart, one on each side, called an auricle—a name that means “ear like”—because its shape resembles the external ear of a human (Figure 6.1.5). Auricles are rela...
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 6.1.4). 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. The middle and ...
Recall that the heart’s contraction cycle follows a dual pattern of circulation—the pulmonary and systemic circuits—because of the pairs of chambers that pump blood into the circulation. In order to develop a more precise understanding of cardiac function, it is first necessary to explore the internal anatomical structures in more detail.
- Anna Chruścik, Kate Kauter, Louisa Windus, Eliza Whiteside
- 2021
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.
Oct 30, 2023 · The heart contains three basic layers similar to those seen in arteries and veins. The outermost layer is the epicardium, which is derived from the proepicardium (from the septum transversum). The middle layer is the myocardium, and the innermost layer is the endocardium, which originated from mesothelial cells of the outflow tract.
