What is the innermost layer of the heart?

Prepare for the Patient Care Technician Certification Exam with our terminology quiz. Study using engaging flashcards and multiple-choice questions, complete with hints and explanations, to excel in your certification test.

Multiple Choice

What is the innermost layer of the heart?

Explanation:
The heart wall has three layers from outer to inner: epicardium on the outside, myocardium in the middle, and endocardium lining the inner chambers and valves. The pericardium is the outer sac that surrounds the heart, not part of the heart wall itself. Since endocardium lines the interior surfaces where blood flows, it is the innermost layer.

The heart wall has three layers from outer to inner: epicardium on the outside, myocardium in the middle, and endocardium lining the inner chambers and valves. The pericardium is the outer sac that surrounds the heart, not part of the heart wall itself. Since endocardium lines the interior surfaces where blood flows, it is the innermost layer.

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