Musculoskeletal System

Bone fracture-hematoma formation

Normal bone
Early fracture
Hematoma

Bone fracture-osteoid (woven bone) formation

Callus in third week: replacement by compact mature lamellar bone
Lamellar bone

Fracture callus

Fractured native bone trabeculae: (lamellar)
Callus: woven bone

Fractured lamellar bone trabeculae

Callus: woven bone
Fracture callus

Osteoblasts rimming trabeculae of woven bone

osteoclast

exuberant callus formation following fracture.