In which of the following tissue, cells of the tissue are enclosed in small cavities within the solid and pliable matrix secreted by them ?

Options

A. Dense connective tissue
B. Loose connective tissue
C. Bone
D. Cartulage

Answer

To solve the question, we need to identify which tissue type has cells that are enclosed in small cavities within a solid and pliable matrix that they secrete. Let's analyze the options provided:

1. **Dense Connective Tissue**: This type of tissue is characterized by a high density of collagen fibers, providing strength and support. However, the cells (fibroblasts) are not enclosed in cavities; they are embedded within the dense matrix.

2. **Loose Connective Tissue**: This tissue has a more flexible and less dense arrangement of fibers, with cells (like fibroblasts and macrophages) scattered throughout the matrix. Similar to dense connective tissue, the cells are not enclosed in cavities.

3. **Bone**: Bone tissue is a rigid structure that provides support and protection. The cells (osteocytes) are located in small cavities called lacunae, but the matrix is not pliable; it is hard and mineralized.

4. **Cartilage**: This is a specialized type of connective tissue that is both solid and pliable. The cells of cartilage, known as chondrocytes, are indeed enclosed in small cavities called lacunae within the matrix that they secrete. The matrix is firm yet flexible, allowing it to resist compression.

Based on this analysis, the correct answer is **Cartilage**.

### Final Answer:
The tissue in which cells are enclosed in small cavities within a solid and pliable matrix secreted by them is **Cartilage**.