Science Illustrated

How exactly do our bones heal? And do punches cause us to lose our... uh...

A fractured bone often requires weeks or months in a cast, but subsequent­ly, the healed fracture is often the strongest part of the bone.

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BLOOD FLOWS TO THE FRACTURE

When a bone is fractured, 1 blood vessels in the fracture are torn, causing accumulati­on of blood between the fractures.

STEM CELLS GENERATE NEW BONE TISSUE

Osteogenic stem cells arrive 2 to generate new bone tissue. At the same time, blood vessels join across the fracture.

ACCUMULATI­ON OF BLOOD TURNED CARTILAGE

The osteogenic cells generate 3 cartilage- like tissue, which will absorb calcium salts over a few months, becoming ever harder.

THE BONE HEALS

After a few months, the 4 fracture has healed. During the healing period, the injured body part has been kept in check, making all except the new bone tissue weaker.

 ??  ?? A C C U M U L AT I O N OF BLOOD OSTEOGENIC CELL CARTILAGIN­OUS TISSUE
A C C U M U L AT I O N OF BLOOD OSTEOGENIC CELL CARTILAGIN­OUS TISSUE
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