Osteoblasts are specialized cells responsible for the formation of bone tissue. They produce a matrix of proteins and minerals that form the structure of bones, primarily composed of collagen and calcium phosphate. These cells play a crucial role in the growth, repair, and maintenance of bones throughout a person's life. When osteoblasts become surrounded by the bone matrix they create, they mature into osteocytes, which help maintain bone health. Osteoblast activity is essential for processes like bone remodeling and healing after fractures, ensuring that bones remain strong and functional as the body ages.