Which of the following lack blood supply ?

Options

A. Bone
B. Connective tissue
C. Cartilage
D. None of these.

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks which of the given options lacks blood supply.

2. **Analyzing Option A - Bone**:
- Bones are vascular structures.
- They contain bone marrow, where red blood cells (RBCs) are produced.
- Therefore, bones have a blood supply, and this option is incorrect.

3. **Analyzing Option B - Connective Tissue**:
- Connective tissues are a broad category that includes various types.
- Blood vessels are present in many connective tissues, providing them with nutrients.
- Thus, connective tissues also have a blood supply, making this option incorrect.

4. **Analyzing Option C - Cartilage**:
- Cartilage is known to be avascular (non-vascular), meaning it lacks a direct blood supply.
- It does not transport blood or nutrients directly.
- Nutrients for cartilage are supplied by the perichondrium, a layer surrounding the cartilage, which diffuses nutrients into the cartilage.
- Therefore, this option is correct as cartilage lacks blood supply.

5. **Conclusion**: The correct answer is Option C - Cartilage, as it is the only structure among the options that lacks blood supply.