Periosteum & formation of bones.

Define periosteum.

• It's a membrane that surrounds bones.

• It covers the ends of a bone.

• It covers the part of a bone that is not covered in cartilage.

Periosteum contains:

• Nerves.

• Blood vessels.

• Cells to produce new bone cells.

• Cartilage.

One of the functions of periosteum is to :

• Heal bones after injury.

• prevent bones from being broken.

• Produce nerve cells.

• Produce blood cells.

Before birth the skeleton is mostly made of :

• Cartilage

• Compact bone.

• Spongy bone.

Growth plates are:

• regions that produce new bone cells.

• regions where cartilage is made.

• The weakest part of an adolescent bone.