Bone

Definition

Bone is a rigid organ that constitutes part of the vertebrate skeleton, providing structural support and protection for various organs. It also serves as a reservoir for minerals like calcium and phosphorus.

5 Must Know Facts For Your Next Test

1. Bones are composed of collagen fibers and mineral deposits, primarily hydroxyapatite.
2. The human skeletal system consists of 206 bones in adults.
3. Bone tissue can be classified into two types: compact bone and spongy bone.
4. Osteoblasts, osteoclasts, and osteocytes are the primary cells involved in bone formation and resorption.
5. Bone marrow within bones is responsible for producing blood cells through the process of hematopoiesis.

Review Questions

• What are the two types of bone tissue?
• Which cells are primarily responsible for bone formation?
• How many bones does an adult human skeleton have?

Related terms

Compact Bone: Dense bone tissue that forms the outer layer of bones, providing strength and structure.

Spongy Bone:

Lighter, porous tissue found inside bones, particularly at the ends of long bones.

Osteoblasts:

Cells that synthesize new bone matrix by producing collagen and facilitating mineralization.