In which of the following tissues is the matrix not product of synthesis of its cells?

Options

A. Vascular tissue
B. Osseus tissue
C. Loose connective tissue
D. Adipose tissue.

Answer

To solve the question "In which of the following tissues is the matrix not a product of synthesis of its cells?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding the Question**:
- We need to identify a tissue where the matrix is not produced by the cells of that tissue.

2. **Analyzing Each Option**:
- **Vascular Tissue**:
- This is primarily found in plants (like xylem and phloem) and is responsible for the transport of nutrients and water. The matrix here is not produced by the cells of the vascular tissue itself, as it is more about the transport system.
- **Osseous Tissue (Bone Tissue)**:
- This is a type of connective tissue that forms the skeleton. The matrix of osseous tissue is made up of organic compounds (like collagen) and inorganic compounds (like calcium phosphate). However, the matrix is indeed produced by the cells (osteoblasts) of the osseous tissue.
- **Loose Connective Tissue**:
- This type of connective tissue has a matrix that is produced by its cells (fibroblasts). The matrix consists of fibers and ground substance that support various structures in the body.
- **Adipose Tissue**:
- Adipose tissue is specialized for storing fat. The matrix in adipose tissue is also produced by its cells (adipocytes), which store lipids and provide cushioning and insulation.

3. **Conclusion**:
- After analyzing all options, the correct answer is **Vascular Tissue**. In vascular tissue, the matrix is not a product of synthesis by the cells of the tissue itself.

### Final Answer:
The correct option is **Vascular Tissue**.