What is the outer covering of the myocardium?

What is the outer covering of the myocardium?

Epicardium
The walls of the heart are composed of three layers: Epicardium – the outer layer. Myocardium – the middle, muscular layer. Endocardium – the inner layer.

What membrane surrounds the myocardium?

The parietal serous pericardium, which lines the interior side of the superficial portion of the pericardial sac, is fused to and inseparable from the fibrous pericardium. The visceral serous pericardium, also known as the epicardium, covers the myocardium of the heart and can be considered its serosa.

What tissue is on the outside of the heart?

The epicardium is the outermost layer of the heart. It is actually the visceral layer of the serous pericardium, which adheres to the myocardium of the heart. Histologically, it is made of mesothelial cells, the same as the parietal pericardium.

What is superficial to the myocardium?

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. The middle and thickest layer is the myocardium, made largely of cardiac muscle cells.

What are the right and left atria?

There are two atria in the human heart – the left atrium receives blood from the pulmonary (lung) circulation, and the right atrium receives blood from the venae cavae (venous circulation). The atria receive blood while relaxed (diastole), then contract (systole) to move blood to the ventricles.

What is myocardium made up of?

cardiac muscle cells
The myocardium is the muscular layer of the heart. It consists of cardiac muscle cells (cardiac myocytes [also known as cardiac rhabdomyocytes] or cardiomyocytes) arranged in overlapping spiral patterns.

Is myocardium a tissue?

Cardiac muscle tissue, or myocardium, is a specialized type of muscle tissue that forms the heart. This muscle tissue, which contracts and releases involuntarily, is responsible for keeping the heart pumping blood around the body.

Where is the right atria?

The right atrium is one of the four hollow chambers of the interior of the heart. It is located in the upper right corner of the heart superior to the right ventricle.

What is the right atrium responsible for?

The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle through the tricuspid valve. The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve.

Where is your right atrium?

heart
Right atrium: The right upper chamber of the heart. The right atrium receives deoxygenated blood from the body through the vena cava and pumps it into the right ventricle which then sends it to the lungs to be oxygenated.

What makes up the outer layer of the myocardium?

This outer layer, or visceral pericardium, consists of a surface of flattened epithelial (covering) cells resting upon connective tissue. heart In heart …a tough muscular wall, the myocardium. A thin layer of tissue, the pericardium, covers the outside, and another layer, the endocardium, lines the inside.

Is the myocardium part of the peripheral nervous system?

Myocardium. Myocardium is the muscular middle layer of the wall of the heart. It is composed of spontaneously contracting cardiac muscle fibers which allow the heart to contract. Heart contraction is an autonomic (involuntary) function of the peripheral nervous system. The myocardium is surrounded by the epicardium…

What are the layers of the heart epicardium?

Key facts about the layers of the heart Epicardium Visceral layer of serous pericardium Com Myocardium Muscle layer Comprised of cardiomyocytes Endocardium Lines inner surface of heart chambers an Clinical relation Endocarditis

Which is the thinmost layer of the heart wall?

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.