Here's a breakdown of their function:

* Osteoblasts are responsible for synthesizing and depositing new bone matrix, which is made up of collagen and minerals like calcium and phosphate. They essentially "build" the bone.

* Osteoclasts are the cells that break down bone tissue, a process called bone resorption. This is essential for remodeling and repair.

* Osteocytes are mature bone cells that maintain bone tissue and communicate with osteoblasts and osteoclasts.

So, while osteoclasts help shape bone, osteoblasts are the primary builders of bone tissue.