The wall of Human heart is thick due to presence of `:-`

Options

A. Inner layer endocardium
B. Middle layer myocardium
C. Outer most layer paricardium
D. Outer layer epicardium

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of the Heart:**
The human heart has three main layers: the outer layer (epicardium), the middle layer (myocardium), and the inner layer (endocardium).

2. **Identifying the Thickest Layer:**
Among these layers, the myocardium is the thickest. This layer is composed of cardiac muscle tissue, which is responsible for the heart's ability to pump blood.

3. **Function of the Myocardium:**
The myocardium consists of cardiac muscle cells (cardiomyocytes) that are arranged in sheets. This structure allows for efficient contraction and relaxation of the heart muscle, enabling it to pump blood effectively throughout the body.

4. **Conclusion:**
Therefore, the wall of the human heart is thick primarily due to the presence of the myocardium.

**Final Answer:**
The wall of the human heart is thick due to the presence of the myocardium.

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