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More on Bones and the Skeletal System

Periosteum: The periosteum is a fibrous thick, white, tough, and vascular, double membrane that surrounds the outside of bones. The prefix peri means "around" and osteum means bone. The outer layer of the periosteum is a tough, fibrous protective layer. The inner layer is the osteogenic layer and contains cells responsible for making new bone, osteoblasts, which are make new bone cells, and osteoclasts which break up and destroy bone. Together, the two types of cells regulate the amount of bone. The periosteum is firmly anchored to the bone by Sharpey's fibers. The fibers of the periosteum are continuous with the ligaments and tendons that are connected to it.

periosteum of bone diagram

internal structure of a long bone with periosteum and other features labelled

This page created 27 Feb 2012 01:11
Last updated 01 Mar 2016 19:57

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