Lamellar bone, also known as secondary bone, is the type of bone that makes up the adult skeleton.
Understanding Lamellar Bone
Here's a breakdown of its key features:
Composition and Structure
- Lamellar bone is characterized by its highly organized structure. It's formed in sheets called lamellae.
- These lamellae are composed of mineralized osteoid, which gives the bone its strength and rigidity.
Strength and Organization
- Due to its organized lamellar structure, lamellar bone is significantly stronger than woven bone, which is a more immature bone type.
- This organized arrangement of mineralized osteoid provides enhanced mechanical integrity.
Types of Lamellar Bone
Lamellar bone itself can be further categorized into two types:
| Type | Description |
|---|---|
| Compact Bone | Dense outer layer of bone providing structural support. |
| Spongy Bone | Porous inner layer of bone, also called cancellous bone, which reduces weight and houses marrow. |
Key Characteristics Summarized
- Adult Bone: It's the primary bone type in adults.
- Organized Structure: Made of highly structured lamellae.
- Strong: Significantly stronger than woven bone.
- Two Types: Includes both compact and spongy bone.
In conclusion, lamellar bone is the mature, organized bone structure found in adults, composed of mineralized lamellae and forming the adult skeleton's structural framework in compact and spongy forms.
