Endochondral Ossification

Endochondral21 (EN-doe-CON-drul) ossification produces most other bones, including the vertebrae, pelvic bones, and bones of the limbs. It is a method in which mesenchyme first transforms into a hyaline cartilage model that resembles the shape of the bone to come, and then the cartilage is broken down, reorganized, and calcified to form a bone (fig. 7.8).

Calcified Fetus
Figure 7.7 Intramembranous Ossification. Developing cranial bones of the human fetus. Note the layers of osteoid tissue, osteoblasts, and fibrous periosteum on both sides of the bone.

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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