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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.

Which of the following structures in a bone persists for life?

Figure 2 is an adult long bone. Choose the letter of the correct location of which the Functional unit is the Osteon and is located on the diaphysis.

Osteoblasts are to bone deposition as:

The layers of bone tissue immediately deep to the periosteum are:

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.

Figure 5 shows the formation of a “bone collar” (at the black arrows) during the ossification process. It is composed of _____ bone and is produced by____.

Figure 2 is an adult long bone. Choose the letter of the correct structure that lines the medullary cavity.

What kind of tissue would you expect to find within the layers of the digestive tract that is responsible for the movement of food during digestion?

Figure 6 shows a section of long bone where growth in length is occurring during infancy and youth. Which LETTER label points to the Zone of Proliferation where mitosis is occurring in chondrocytes?