SSEH1101 Study Guide - Final Guide: Perichondrium, Apatite, Chondrocyte
19 Jun 2018
School
Department
Course
Professor
SSEH1101: Revision Notes 8
Functions of Skeletal System:!
-Acronym: SPLR!
-Support!
-Protect!
-Locomotion!
-Production of RBC!
Types of bone:
-Flat bones!
-Short/irregular bones!
-Long bones!
Flat Bones:
-Formed in 1 stage!
-DIRECT OSSIFICATION!
Short/Irregular Bones:
-INDIRECT OSSIFICATION
-1. Cartilage model develops!
-Chondroblast -> chondrocytes!
-Perichondrium develops!
-2. Calcification of cartilage !
-Bone collar is developed in the shaft!
-Chondrocytes hypertrophy, then die!
-Blood vessels grow toward cartilage!
-Osteoblast under perichondrium
become bone!
-3. Primary ossification center forms!
-Periosteal bud = osteoblast and blood
vessels!
-12th week: MOSTLY FORMED
ALREADY!
Long bones:
-Indirect ossification also !
-But in multi stage process!
Composition of bone:
-60-70%: minerals!
-30-40%: collagen !
-Some ground substance = apatite!
