Haversian system is a feature of

Options

A. Compact bone
B. Cancellous bone
C. Both (i) & (ii)
D. Spongy bone

Answer

To solve the question "Haversian system is a feature of," we can follow these steps:

### Step 1: Understand the Haversian System
The Haversian system, also known as the osteon, is a structural unit of compact bone. It consists of a central canal surrounded by concentric rings of bone matrix and is crucial for the strength and function of bones.

### Step 2: Identify the Types of Bone
There are different types of bone in the human body:
- **Compact Bone**: Dense and forms the outer layer of bones.
- **Cancellous Bone**: Also known as spongy bone, it is lighter and has a porous structure.
- **Spongy Bone**: Typically found at the ends of long bones and in the interior of others.

### Step 3: Analyze the Options
- **Option A: Compact Bone** - This is where the Haversian system is primarily found.
- **Option B: Cancellous Bone** - This type of bone does not have a Haversian system.
- **Option C: Both 1 and 2** - This is incorrect as only compact bone has the Haversian system.
- **Option D: Spongy Bone** - Similar to cancellous bone, spongy bone does not contain a Haversian system.

### Step 4: Conclusion
Based on the information about the Haversian system being a feature of compact bone, the correct answer is:
**Option A: Compact Bone.**