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NEETZoologyBody Fluids and Circulation

Layer of Heart wall Characteristic A. Epicardium 1. Outer layer, protective B. Myocardium 2. Middle layer, muscular, and contractile C. Endocardium 3. Sac surrounding the heart D. Pericardium 4. Inner layer, lines heart chambers

Options

  1. AA-2; B-1; C-3; D-4
  2. BA-1; B-3; C-2; D-4
  3. CA-1; B-2; C-4; D-3
  4. DA-1; B-2; C-3; D-4

Correct answer

C. A-1; B-2; C-4; D-3

Step-by-step solution

The epicardium is the outermost layer of the heart wall and provides protection. The myocardium is the muscular middle layer responsible for the heart's contractile force. The endocardium is the innermost layer that lines the chambers of the heart. The pericardium is the sac that surrounds and protects the heart.

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