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The cardiac conduction tissues in the human heart comprise specialized myocytes that can be differentiated from working myocardium with routine histological staining. They are located in specific regions of the heart to form the sinus node and the atrioventricular (AV) node, which then extend into the AV bundle and bundle branches
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What is bundle of His in cardiology?
The Bundle of His (Hiss) is a bundle of electrical nodes which allow the ventricles to contract. The bundle is located in the ventricular septum which divides the two ventricles and separates into the Perkinje fibers at the apex of the heart. It is located in the myocardium.
Where is the myocardium located in the heart?
The myocardium is located between the endocardium and the visceral layer of the serous membrane (epicardium) of the heart.
Where does blood enter the myocardium?
Oxygenated blood is brought to the myocardium by coronary arteries. These arteries are located all around he surface of the heart.
What type of blood is located you the left side of the heart?
Ventricular
What following is located closest to the center of the heart?
The structure located closest to the center of the heart is the myocardium, which is the thick muscular layer responsible for the heart's contraction. Surrounding the myocardium is the endocardium, which lines the heart's chambers. The innermost layer of tissue, the endocardium, is in direct contact with the blood flowing through the heart.
Is the left ventricular wall a site of arterial baroreceptor?
The baroreceptors are located in carotid sinus. They are not located in your left or right ventricles.
Where is a VSD located in the heart?
VSD stands for ventricular septal defect. So a VSD is located in the septum (wall) between the two ventricles.
Where is endocardium located?
The endocardium is a thin layer of tissue that lines the inside of the heart chambers and heart valves. It is located beneath the myocardium (muscle layer) and covers the inner surface of the heart.
Where is the blood barrrier located?
The blood barrier is located in the brain. It is known as the blood brain barrier and is located in the middle of the ventricular system. It keeps many substances from being able to cross into the brain.
Where does ventricular contractions start?
Ventricular contractions start in the Purkinje fibers, which are specialized muscle fibers located in the walls of the ventricles of the heart. These fibers rapidly conduct the electrical signals to synchronize the contraction of the ventricles and pump blood out of the heart.
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How many walls does the heart has?
The heart wall is richly supplied with blood vessels, and it is composed of three layers: the epicardium, the myocardium, and the endocardium.First layer--Epicardium is the visceral layer of the serous pericardium. It is often infiltrated with fat, especially in older people.Middle layer--Myocardium ("muscle heart") is composed mainly of cardiac muscle and forms the bulk of the heart. It is the layer that contracts.Third layer--Endocardium ("inside the heart") is a glistening white sheet of endothelium (squamous epithelium) resting on a thin connective tissue layer. Located on the innermyocarial surface, it lines the heart chambers and covers the fibrous skeleton of the valves. Endocardium is continuous with the endothelial linings of the blood vessels leaving and entering the heart.
