Heart Anatomy
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20 Terms
Where is the heart located in the body?
Mediastinum
Which layer of the heart is the outermost layer?
Epicardium
Which layer of the heart is responsible for contraction?
Myocardium
Which layer lines the inner chambers and valves of the heart?
Endocardium
What is the primary function of the pericardial sac?
To protect and lubricate the heart
Which layer of the heart is directly attached to the heart?
Epicardium
What is the function of the myocardium?
It contracts the heart muscle to pump blood
How much pericardial fluid does the pericardial sac contain?
5-20 mL
The myocardium is responsible for which of the following?
Contraction of the heart
What does the epicardium do?
Protects the heart and provides a smooth surface
What function does the endocardium serve?
It lines the inner chambers and valves of the heart
Where is the mediastinum located?
In the chest cavity
The heart's muscle layer is the:
Myocardium
Which layer of the heart is closest to the blood flow?
Endocardium
What is the pericardium?
The sac that surrounds and protects the heart
How does the pericardial sac protect the heart?
By reducing friction and preventing irritation during heart movement
The heart’s inner lining is called the:
Endocardium
Which layer of the heart is most involved in pumping blood?
Myocardium
What does the pericardial fluid do?
Lubricates the heart and reduces friction during its movement
Which layer of the heart is the thickest?
Myocardium