Topic: Structure of Long Bone 🦴Parts, Functions and Diagram Guide

Long bones are hard, dense bones that are longer than they are wide. They support body weight, help movement, and store minerals. Examples include the femur, humerus, tibia, and radius.
Main Structure of Long Bone
Diaphysis (Shaft)
Long middle portion of bone
Made of compact bone
Gives strength and support
Epiphysis (Ends)
Rounded ends of long bone
Made of spongy bone
Helps form joints
Metaphysis
Region between shaft and ends
Contains growth plate in children
Periosteum
Outer covering of bone
Contains blood vessels and nerves
Helps repair bone
Medullary Cavity
Hollow center of shaft
Contains bone marrow
Bone Marrow
Red marrow makes blood cells
Yellow marrow stores fat
Articular Cartilage
Covers bone ends
Reduces friction in joints
Functions of Long Bone
Support body weight
Help in movement
Produce blood cells
Store calcium and phosphorus
Examples of Long Bones
Femur
Humerus
Tibia
Fibula
Radius
Ulna

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