The types of major tissues that are present in human heart are  

Options

A. only one type
B. only two types
C. only three types
D. all four types

Answer

To answer the question about the types of major tissues present in the human heart, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Identify the Major Tissue Types**:
- The human body consists of four major types of tissues: epithelial, connective, muscular, and nervous tissues.

2. **Examine the Structure of the Heart**:
- The heart is composed of different layers, each made up of specific types of tissues.

3. **Outer Layer - Pericardium**:
- The outermost layer of the heart is called the pericardium, which is primarily made up of connective tissue. This layer provides protection and structural support to the heart.

4. **Middle Layer - Myocardium**:
- The middle layer is known as the myocardium, which is made up of muscular tissue. This layer is responsible for the contraction of the heart, enabling it to pump blood.

5. **Inner Layer - Endocardium**:
- The innermost layer is called the endocardium, which consists of simple squamous epithelial cells. This layer lines the heart chambers and covers the heart valves.

6. **Nervous Tissue**:
- Nervous tissue is also present in the heart, specifically in the form of specialized nodes such as the sinoatrial (SA) node and atrioventricular (AV) node. These nodes are crucial for regulating the heartbeat.

7. **Conclusion**:
- Therefore, the human heart contains all four major types of tissues: epithelial (endocardium), connective (pericardium), muscular (myocardium), and nervous (SA and AV nodes).

### Final Answer:
The types of major tissues present in the human heart are:
1. Epithelial Tissue
2. Connective Tissue
3. Muscular Tissue
4. Nervous Tissue

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