Question

In the process of bone healing, which of the following sequences of events is correct?

A) A hematoma forms, granulation tissue and fibrocartilage develop, osteoclasts and phagocytes clear away debris, bony callus forms.
B) Osteoclasts and phagocytes clear away debris, bony callus forms, a hematoma forms, granulation tissue and fibrocartilage develop.
C) Granulation tissue and fibrocartilage develop, a hematoma forms, bony callus forms, osteoclasts and phagocytes clear away debris.
D) Bony callus forms, a hematoma forms, osteoclasts and phagocytes clear away debris, granulation tissue and fibrocartilage develop.

Answer 1

The correct sequence of events in bone healing is hematoma formation, granulation tissue and fibrocartilage development, debris clearance by osteoclasts and phagocytes, and the formation of a bony callus.

Step-by-step explanation:

The correct sequence of events in the process of bone healing is as follows:

1. A hematoma forms
2. Granulation tissue and fibrocartilage develop
3. Osteoclasts and phagocytes clear away debris
4. Bony callus forms

When a bone is fractured, blood vessels tear and hemorrhage, causing a hematoma to form. Capillaries then grow into the hematoma, and phagocytic cells start to clear away dead cells. Fibroblasts and osteoblasts enter the area, producing collagen fibers to connect the broken bone ends and forming a repair tissue called the fibrocartilaginous callus. Finally, this callus is converted into a bony callus of spongy bone, which is then remodeled by osteoclasts and osteoblasts to create bone tissue that resembles the original bone.