Though cartilage is avascular, it draws nourishment from the blood vessels of  

Options

A. periosteum
B. perichondrium
C. dense fibrous tissue
D. elastic connective tissue

Answer

To answer the question "Though cartilage is avascular, it draws nourishment from the blood vessels of," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Avascularity**:
- Cartilage is classified as avascular, meaning it does not contain blood vessels. This characteristic limits its ability to receive nutrients and oxygen directly from the bloodstream.

2. **Nutrient Supply Mechanism**:
- Since cartilage lacks blood vessels, it must rely on surrounding structures to obtain nutrients. These structures provide essential nourishment and oxygen to the cartilage cells.

3. **Identifying the Surrounding Structure**:
- The primary structure that surrounds cartilage and supplies it with nutrients is called the **perichondrium**. The perichondrium is a layer of dense connective tissue that contains blood vessels.

4. **Excluding Other Options**:
- The other options provided in the question include periosteum, dense fibrous tissues, and elastic connective tissues.
- **Periosteum**: This is the connective tissue that surrounds bones, not cartilage.
- **Dense fibrous tissues**: While they contribute to the structure of the perichondrium, they do not directly provide nourishment to cartilage.
- **Elastic connective tissues**: These are a type of connective tissue that contains elastic fibers, but they do not serve the function of nourishing cartilage.

5. **Conclusion**:
- Therefore, the correct answer to the question is that cartilage draws nourishment from the blood vessels of the **perichondrium**.

### Final Answer:
Cartilage draws nourishment from the blood vessels of the **perichondrium**.