Which of the following can be related to the tissue called blood ?

Options

A. It has a fibre-free matrix but in collagen protein
B. It has both nucleated and non-nucleated cells, performing aerobic respiration
C. Blood is a specialised connective tissue
D. It is a form of dense connective tissue, having dense arrangement due to large count of RBCs

Answer

To solve the question regarding the characteristics of blood as a tissue, we will analyze each option provided and determine which one accurately describes blood.

### Step-by-Step Solution:

1. **Understanding Blood as a Tissue**:
- Blood is classified as a specialized connective tissue. It consists of cells suspended in a liquid matrix known as plasma.

2. **Analyzing the Options**:
- **Option 1**: "It has a fiber-free matrix but in collagen protein."
- **Analysis**: Blood does have a fiber-free matrix (plasma), but it does not contain collagen protein. Therefore, this option is incorrect.

- **Option 2**: "It has both nucleated and non-nucleated cells for forming aerobic respiration."
- **Analysis**: Blood contains both nucleated (white blood cells) and non-nucleated (red blood cells) cells. However, red blood cells do not perform aerobic respiration; they primarily undergo glycolysis. Thus, this option is also incorrect.

- **Option 3**: "Blood is a specialized connective tissue."
- **Analysis**: This statement is true. Blood is indeed classified as a specialized connective tissue due to its fluid matrix (plasma) and the presence of various cells (RBCs, WBCs, and platelets). This option is correct.

- **Option 4**: "It is a form of dense connective tissue having a dense arrangement due to a large count of RBC."
- **Analysis**: This is incorrect because dense connective tissues have cells that are compactly packed, which is not the case with blood. Blood cells are suspended in a fluid matrix, making it less dense compared to dense connective tissues.

3. **Conclusion**:
- After analyzing all the options, the correct answer is **Option 3: Blood is a specialized connective tissue**.