Correctly order the following key steps in the process of en…

Correctly order the following key steps in the process of endochondral ossification.1. Chondrocytes die.2. Osteoblasts build the bone collar on the external surface of the bone.3. Perichondrium is invaded by blood vessels.4. In the primary ossification center, osteoblasts replace calcified cartilage with early spongy bone.5. Chondroblasts differentiate into osteogenic cells then into osteoblasts.

Place the following steps of bone repair in the correct sequ…

Place the following steps of bone repair in the correct sequence. 1.The bone callus is remodeled and primary bone is replaced with secondary bone. 2.A hematoma fills the gap between bone fragments. 3.Osteoblasts build a new bone callus. 4.Fibroblasts and chondroblasts infiltrate the hematoma and a soft callus forms.