Layers and Functions of the Heart

This video tutorial discusses the three layers of the heart wall: the epicardium, myocardium, and endocardium. It begins with an overview of the heart wall and the pericardium, which has two layers: fibrous and serous. The epicardium is part of the heart and produces a filtrate in the pericardial cavity. Epicardial adipose tissue is linked to cardiometabolic risk. The myocardium, the thickest layer, is made of cardiac muscle tissue and fibroblasts, enabling heart contractions. The endocardium is an endothelial layer lining the heart's vessels and valves.

What are the three layers of the heart wall?

• Epicardium, Pericardium, Endocardium

• Epicardium, Myocardium, Pericardium

• Epicardium, Myocardium, Endocardium

• Pericardium, Myocardium, Endocardium

Which layer of the pericardium is most external?

• Fibrous pericardium

• Parietal pericardium

• Serous pericardium

• Epicardium

What is found between the epicardium and the parietal pericardium?

• Fibrous pericardium

• Pericardial cavity

• Endocardium

• Myocardium

What does the epicardial adipose tissue indicate?

• Oxygen levels

• Cardiometabolic risk

• Heart rate

• Blood pressure

Which layer of the heart is the thickest?

• Pericardium

• Myocardium

• Endocardium

• Epicardium

What type of tissue predominantly makes up the myocardium?

• Skeletal muscle tissue

• Smooth muscle tissue

• Cardiac muscle tissue

• Connective tissue

Which layer of the heart wall is responsible for the heart's contraction and relaxation?

• Pericardium

• Epicardium

• Myocardium

• Endocardium

Which layer of the heart wall is contiguous with the linings of the great vessels?

• Pericardium

• Endocardium

• Myocardium

• Epicardium

What is the function of the endocardium?

• To produce filtrate

• To supply blood to the myocardium

• To envelop the valves of the heart

• To store adipose tissue