Solved UPSC CDS/OTA Question
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Q · Circulatory Systemmedium · 45s
Which layer of the heart wall contains cardiac muscle tissue?
TopicCirculatory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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The myocardium is the thick, middle muscular layer composed of cardiomyocytes interconnected by intercalated discs. It generates contractile force for blood ejection; thickness varies with workload—thicker in left ventricle.
Final Answer: Option B - Myocardium