What is the middle layer of the wall of the heart?Multiple choice question.pericardiummyocardiumendocardium
Question
What is the middle layer of the wall of the heart?
- pericardium
- myocardium
- endocardium
Solution
Step 1: Break Down the Problem
To identify the middle layer of the wall of the heart, we need to analyze the given options.
Step 2: Relevant Concepts
The heart is composed of three layers:
- Epicardium - the outer layer
- Myocardium - the middle layer responsible for heart muscle contractions
- Endocardium - the inner layer lining the chambers of the heart
Step 3: Analysis and Detail
From the choices provided:
- Pericardium is the fibrous sac surrounding the heart, not a layer of the heart wall.
- Myocardium is the heart muscle layer that is crucial for pumping blood.
- Endocardium is the layer inside the heart chambers.
Step 4: Verify and Summarize
Since the myocardium is established as the middle layer that plays a critical role in cardiac function, we confirm this answer.
Final Answer
Myocardium is the middle layer of the wall of the heart.
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