CONTENTS. ix 



The Decidua Basalis 12 ^ 



The Umbilical Cord I3 2 



The Expulsion of the Placenta and Membranes 134 



Anomalies i^ 



Practical Suggestions ^5 



References for Further Study 136 



CHAPTER VIII. 



THE DEVELOPMENT OF THE EXTERNAL FORM OF THE BODY 137 



Branchial Arches Face Neck 149 



The Extremities 153 



Age and Length of Embryos 155 



Normal, Abnormal and Pathological Embyos 158 



Practical Suggestions 159 



References for Further Study 161 



PART II. ORGANOGENESIS. 



CHAPTER IX. 



THE DEVELOPMENT OF CONNECTIVE TISSUES AND THE SKELETAL SYSTEM . . .165 



Histogenesis 167 



Fibrillar Forms 170 



Adipose Tissue 171 



Cartilage 172 



Osseous Tissue 173 



Intramembranous Ossification 173 



Intracartilaginous Ossification 176 



The Development of the Skeletal System 182 



The Axial Skeleton 182 



The Notochord 182 



The Vertebras 183 



The Ribs 188 



The Sternum 189 



The Head Skeleton 19 



Ossification of the Chondrocranium 194 



Membrane Bones of the Skull 196 



Bones Derived from the Branchial Arches 198 



The Appendicular Skeleton -202 



Development of Joints 20 9 



Anomalies 213 



Practical Suggestions 2I 7 



References for Further Study , 2I 9 



