Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 32, Skeletal, Muscular, and Integumentary Systems - Assessment - 32.1 The Skeletal System - Understand Key Concepts/Think Critically - Page 942: 2



Work Step by Step

Human embryo have skeletons made initially of cartilage. About seven months before the baby is born, ossification begins, which is the process by which cartilage is replaced by bone tissue. Bone cells called osteoblasts deposit minerals that replace cartilage. Osteoblasts eventually become osteocytes, which are bone cells that maintain the mineral content of bone tissue.
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