Definition

A tough, fibrous layer that covers the outer surface of bones, except at the joints, and helps attach muscles and tendons to the bones.

Example

The surgeon carefully removed the periosteum to access the underlying bone during the operation.

Conversation

Did you know the periosteum is crucial for bone health?

Really? I had no idea it played such an important role.

Yeah, it helps attach muscles and tendons to bones.

That makes sense! It's fascinating how our bodies work.

Synonyms & Antonyms

Root Explanation

Periosteum → It is formed from "peri-" (meaning around) and "osteon" (meaning bone). The word refers to the connective tissue that surrounds the bones, hence it is the layer around the bone.

Memory Tip

Think of something that is 'around' ('peri-') the 'bone' ('osteon') — that's why periosteum refers to the tissue surrounding the bone.

Visually Confused Words