Changes

===Length===

===Length===

*The '''epiphyseal growth plate (EPG)''' allows the [[Bones and Cartilage - Anatomy & Physiology#Types of Bone|bone]] to continue to grow in length after birth.

The '''epiphyseal growth plate (EPG)''' allows the [[Bones and Cartilage - Anatomy & Physiology#Types of Bone|bone]] to continue to grow in length after birth. The EPG is a region of continuous chondroblast differentiation and maturation and can be divided into five zones:

*The EPG is a region of continuous chondroblast differentiation and maturation.

*The EPG is divided into five zones:

#'''Germinal Zone''' - chondroblast division at a low rate, and self renewal.

1.'''Germinal Zone''' - chondroblast division at a low rate, and self renewal.

#'''Proliferation Zone''' - chondroblast division at a fast rate.

 

#'''Maturation Zone''' - chondroblast differentiation into chondrocytes.

2.'''Proliferation Zone''' - chondroblast division at a fast rate.

#'''Hypertrophic Zone''' - chondrosytes enlarge and then die.

 

#'''Dead cells''' become the matrix for bone growth.

3.'''Maturation Zone''' - chondroblast differentiation into chondrocytes.

 

4.'''Hypertrophic Zone''' - chondrosytes enlarge and then die.

 

5.'''Dead cells''' become the matrix for bone growth.

===Girth===

===Girth===