👉 Osteoclasty is a type of bone cell that breaks down and replaces old or damaged bones. It plays an important role in maintaining healthy bone structure and function in the human body. The process begins with a new bone cell, called an osteoblast, which grows into a new bone by creating new bone matrix (osteoprogenitor) from its surrounding cells (osteoclasts). As the osteoblast grows larger and more numerous, it produces new bone tissue that replaces the