x CONTENTS. 



CHAPTER X. 



THE DEVELOPMENT OF THE VASCULAR SYSTEM 222 



The Blood Vessels and Blood 222 



The Heart 222 



The Septa 229 



The Valves 231 



Changes after Birth 233 



The Vessels 235 



Origin 235 



The Arteries 243 



The Veins 253 



Histogenesis of the Blood Cells 270 



The Lymphatic System 276 



The Lymphatic Vessels 276 



The Lymph Glands 279 



The Spleen 282 



Glomus Coccygeum 285 



Anomalies 285 



Practical Suggestions 289 



References for Further Study 291 



CHAPTER XL 



THE DEVELOPMENT OF THE MUSCULAR SYSTEM 293 



The Skeletal Musculature 293 



Muscles of the Trunk 295 



Muscles of the Head 300 



Muscles of the Extremities 303 



Histogenesis of Striated Voluntary Muscle Tissue 307 



The Visceral Musculature 311 



Histogenesis of Heart Muscle 311 



Histogenesis of Smooth Muscle 312 



Anomalies 313 



Practical Suggestions 314 



References for Further Study 315 



CHAPTER XII. 



THE DEVELOPMENT OF THE ALIMENTARY TUBE AND APPENDED ORGANS . .317 



The Mouth 318 



The Tongue 321 



The Teeth * 323 



The Salivary Glands '. , 328 



The Pharynx . 330 



The Branchial Epithelial Bodies 332 



