👉 Chondrostei is a type of bone that is primarily found in vertebrates, such as mammals and birds. It consists of two types of cells called chondrocytes, which are specialized cells responsible for forming cartilage, the material used to make bones. In humans, chondrostei forms the outer layer of the cartilage around the ends of long bones like the tibia and femur. The other type of chondrocyte is called osteoblast