The thick middle layer of the heart, composed of cardiac muscle, is theMultiple Choicemyocardium.endocardium.chordae tendineae.epicardium.
Question
Solution
The thick middle layer of the heart, composed of cardiac muscle, is the myocardium.
Explanation:
- Myocardium: This is the muscular middle layer of the heart wall, responsible for the heart's pumping action.
- Endocardium: This is the inner lining of the heart, which does not contain muscle tissue.
- Chordae Tendineae: These are tendons that connect the heart's valves to the heart muscles; they are not a layer of the heart.
- Epicardium: This is the outer layer of the heart, also not muscular tissue.
In conclusion, the correct answer to the question is myocardium.
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