he thick middle layer of the heart, composed of cardiac muscle, is theMultiple Choicemyocardium.endocardium.chordae tendineae.epicardium.
Question
he thick middle layer of the heart, composed of cardiac muscle, is the
Multiple Choice
- myocardium.
- endocardium.
- chordae tendineae.
- epicardium.
Solution
The correct answer to the question about the thick middle layer of the heart, composed of cardiac muscle, is:
myocardium.
Explanation:
- Myocardium: This is the middle layer of the heart wall and consists mainly of cardiac muscle tissue. It is responsible for the heart's contraction and pumping of blood.
- Endocardium: This is the inner layer of the heart that lines the chambers and valves.
- Chordae Tendineae: These are fibrous cords that attach the heart valves to the heart muscles, specifically the papillary muscles, but do not constitute a layer of the heart.
- Epicardium: This is the outer layer of the heart.
In summary, the myocardium is essential for the heart's functionality, as it enables contractions necessary for circulating blood throughout the body.
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