Which bone-forming cell is responsible for building bone tissue?

Which bone-forming cell is responsible for building bone tissue?

• A. Osteoblast
• B. Osteoclast
• C. Chondrocyte
• D. Osteocyte

Answer: (A)

Building bone tissue is carried out by osteoblasts, the cells that synthesize the organic bone matrix and initiate its mineralization. They secrete osteoid, rich in type I collagen and other proteins, creating the framework that becomes hardened as calcium phosphate crystals deposit. This process, called mineralization, turns the organic matrix into solid bone. Many osteoblasts later become embedded in the matrix and differentiate into osteocytes, which maintain rather than build new bone. In contrast, osteoclasts are the bone-resorbing cells that break down bone tissue, helping remodel and regulate mineral balance. Chondrocytes produce cartilage, which serves as a scaffold in certain types of bone formation (endochondral ossification) but do not form bone tissue themselves. Osteocytes are mature bone cells that reside within the bone matrix and maintain its daily health. Thus, the cell responsible for building bone tissue is the osteoblast.

Building bone tissue is carried out by osteoblasts, the cells that synthesize the organic bone matrix and initiate its mineralization. They secrete osteoid, rich in type I collagen and other proteins, creating the framework that becomes hardened as calcium phosphate crystals deposit. This process, called mineralization, turns the organic matrix into solid bone. Many osteoblasts later become embedded in the matrix and differentiate into osteocytes, which maintain rather than build new bone.

In contrast, osteoclasts are the bone-resorbing cells that break down bone tissue, helping remodel and regulate mineral balance. Chondrocytes produce cartilage, which serves as a scaffold in certain types of bone formation (endochondral ossification) but do not form bone tissue themselves. Osteocytes are mature bone cells that reside within the bone matrix and maintain its daily health.

Thus, the cell responsible for building bone tissue is the osteoblast.