Chapter 40.2, Problem 5LO

Summary Introduction

To describe: The structure of a typical long bone and to contrast the roles of osteoblasts and osteoclasts in bone remodeling.

Introduction: Long bones are long, high-density bones that provide the skeleton strength. They are long, in the sense that, their length is greater than their width. This occurs due to elongation of the diaphysis, which is the main shaft. The radius of the arm is an example of a long bone. The outer layer is usually hard and compact, and it covers the inner spongy cavity containing the bone marrow.