The muscle tissue type that consists of single, very long, cylindrical, multinucleate cells with very obvious striations is :

Options

A. skeletal muscle only
B. cardiac and smooth muscle
C. cardiac and skeletal muscle
D. cardiac muscle only

Answer

To determine the muscle tissue type that consists of single, very long, cylindrical, multinucleate cells with very obvious striations, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Characteristics of Muscle Tissue**:
- Muscle tissues can be classified into three main types: skeletal muscle, cardiac muscle, and smooth muscle. Each type has distinct structural characteristics.

2. **Identify the Key Features in the Question**:
- The question specifies that the muscle tissue is:
- Single
- Very long
- Cylindrical
- Multinucleate
- Has very obvious striations

3. **Evaluate the Options**:
- **Option 1: Skeletal Muscle**:
- Skeletal muscle is characterized by long, cylindrical fibers that are multinucleate and exhibit striations. This matches all the criteria given in the question.
- **Option 2: Cardiac Muscle**:
- Cardiac muscle is found in the heart, has branched fibers, and is not multinucleate. It does have striations but does not meet the other criteria.
- **Option 3: Smooth Muscle**:
- Smooth muscle is non-striated, spindle-shaped, and uninucleate. It does not fit the description provided.
- **Option 4: Cardiac Muscle Only**:
- This option is redundant and also incorrect for the same reasons as option 2.

4. **Conclusion**:
- Based on the characteristics and the evaluation of the options, the correct answer is **Option 1: Skeletal Muscle**.

### Final Answer:
The muscle tissue type that consists of single, very long, cylindrical, multinucleate cells with very obvious striations is **Skeletal Muscle**.