What are the layers of the heart tissue ? | Biology Hubspot - Definition and Examples of Biology Terms

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Wednesday, February 27, 2019

What are the layers of the heart tissue ?

What are the layers of the heart tissue ?

What are the layers of the heart tissue

The heart consists of the following three layers viz epicardium, myocardium, endocardium.
Let’s explain these layers one by one.

Epicardium

It is the external layer of the heart that is also known by the visceral layer of serous pericardium. It is tightly attached to the surface of the heart and imparts smooth, slippery texture to its outer surface.

Myocardium

It is the middle layer of the heart that consists of cardiac tissue. The cardiac tissue like the smooth muscle is involuntary in nature and constitutes 95% of the heart.
The myocardium is involved in the pumping action of the heart.

Endocardium

 It is the inner most layer of the heart wall and is present over a thin layer of connective tissue.
The covering of endothelium over the heart chambers and valves provides them a smooth lining. In addition to that, it also lines the large blood vessels and minimizes surface friction as blood passes through the heart and blood vessels.

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