Osteocytes and chondrocytes are similar in  

Options

A. mature cells enclosed in fluid filled lacunae
B. immature cells present outside the lacunae
C. osteocytes are mature cells & chondrocytes are immature
D. none

Answer

To answer the question "Osteocytes and chondrocytes are similar in," we will analyze the characteristics of both cell types and identify their similarities.

### Step-by-Step Solution:

1. **Define Osteocytes**:
- Osteocytes are mature bone cells that are derived from osteoblasts. They are the longest-living cells in bone tissue and make up about 90-95% of the bone cell population.
- Their primary function is to maintain bone tissue and respond to mechanical stress by sending signals related to bone formation and remodeling.

2. **Define Chondrocytes**:
- Chondrocytes are the cells found in cartilage. They are responsible for secreting the extracellular matrix of cartilage and become embedded within it.
- Their main function is to maintain and sustain the cartilage structure.

3. **Identify Similarities**:
- Both osteocytes and chondrocytes are mature cells that are found in specific types of connective tissue (bone and cartilage, respectively).
- Both types of cells are enclosed in small cavities known as lacunae.
- Lacunae are fluid-filled spaces that house these mature cells, providing them with a protected environment.

4. **Evaluate the Options**:
- The question provides several options regarding the similarities between osteocytes and chondrocytes.
- The correct option states that they are "matured cells enclosed in fluid-filled lacunae." This is true for both osteocytes (in bone) and chondrocytes (in cartilage).

5. **Conclusion**:
- Based on the definitions and similarities identified, the correct answer to the question is that osteocytes and chondrocytes are similar in that they are both matured cells enclosed in fluid-filled lacunae.

### Final Answer:
Osteocytes and chondrocytes are similar in that they are matured cells enclosed in fluid-filled lacunae.