University:
Sam Houston State University
Course:
BIOL 2413 | General Zoology
Academic year:

2019
Views:

147

Pages:

10
Author:

larbiwxcvbn

Chapter 2  Chondroblasts/ Chondrocytes – Form cartilage that is associated with bone and can be required for bone growth • Long bones require cartilage before bone can be made  Osteoclasts – involved in bone reabsorption (breakdown) and remodeling.  Osteoblast/Osteocytes  Bone lining cells – inactive cells found on the surface of bone that may serve as osteoblast precursors.  Fibroblasts – part of connective tissue proper that is associated with synthesizing fibers and ground substance. • Ligaments and tendons  Ossification that occurs with the replacement of cartilage with bone  Prenatally a cartilaginous structure develops that will serve as the template for ossification  Ossification of cartilage around the outside of the diaphysis  Primary ossification center in the central portion of the diaphysis  Secondary ossification center is established in the center of each epiphysis A thin layer of articular cartilage remains on the surface of each epiphysis to reduce friction  Growth plate • Increases the length of long bones  Growth of cartilage on the epiphyseal side  Ossification of cartilage on the diaphyseal  The growth of long bones will continue as long as the rate of cartilage growth remains faster than the rate of osteoblast invasion into the growth plate • It groaws until the growth plate ossifies  Epiphyseal closure – fusion of the diaphysis and the epiphyses into a single bone