Vlll 



CONTENTS 



DEVELOPMENT OF THE EYE continued. 

 Protective and Vascular Coats, Iris 



and Aqueous Chamber . . .143 

 Accessory Structures, Eyelids 

 Lacrymal Glands and Ducts . .144 



DEVELOPMENT OF THE EAR . . . 145 



Labyrinth 145 



Auditory Nerve 148 



Accessory Parts of the Organ of Hear- 

 ing, Middle Ear and External Audi- 

 tory Meatus 149 



DEVELOPMENT OF THE NOSE . . . 151 



Palate 154 



Olfactory Nerve 155 



DEVELOPMENT OF THE ALIMENTARY 



CANAL 156 



The Mouth 156 



Pharynx 158 



Tongue 159 



(Esophagus, Stomach, and Intestine . 160 



Caecum 164 



Entodermic Cloaca and Anus . . . 164 



DEVELOPMENT OF THE GLANDS OF THE 

 ALIMENTARY CANAL : 



Salivary Glands 165 



Lungs, Trachea, and Larynx . . . 166 



Thyroid Gland 168 



Thymus Gland 169 



Parathyroid Glands . . . .172 



Liver 173 



Pancreas 175 



DEVELOPMENT OF UROGENITAL SYSTEM : 



Pronephros and Wolffian Duct . . 177 



Mesonephros (Wolffian Body) . . 178 



Metanephros (Permanent Kidney) . 182 

 Urinary Bladder . . . .185 



Genital Glands 186 



Ovary 189 



Testicle 191 



Fate of Wolffian Ducts . . .192 



Miillerian Ducts 193 



Prostate Gland 194 



PAGE 



Descent of Testicle 197 



Fate of Entodermic Cloaca . . .201 



External Organs, Perineum, and Anus 202 



DEVELOPMENT OF SUPRARENAL BODIES 205 

 DEVELOPMENT OF THE VASCULAR 



SYSTEM : 



Outward Form of the Heart . . 206 

 Chambers of Heart and Formation of 



Septa 211 



The Arteries : 



Dorsal Aorta and Aortic Arches . 217 



Carotid System 221 



Segmental Arteries . . . . 223 

 Vitelline Arteries . . . .223 



Arteries of Limbs 224 



The Veins : 



Veins of the Liver .... 224 



Cardinal Veins 226 



Inferior Vena Cava .... 227 



Anterior Cardinal (Jugular) Vein . 229 



Superior Vena Cava . . . . 232 



Veins of Limbs 232 



Peculiarities of Foetal Circulation . 233 



Changes in the Circulation at Birth . 234 



DEVELOPMENT OF LYMPHATIC SYSTEM 235 



DEVELOPMENT OF THE SPLEEN . . 236 



DEVELOPMENT OF THE BODY- CAVITY : 



Pericardium 237 



Septum Transversum .... 238 



Pleural Cavities 239 



Closure of Pleuro-peritoneal Openings 241 



Diaphragm 241 



Mesentery and Epiploic Sac . . . 244 



DEVELOPMENT OF THE MUSCLES . . 246 

 DEVELOPMENT OF THE SKELETON : 



Vertebral Column 250 



Ribs and Sternum 252 



Skeleton of Limbs . . . .254 



Chondro cranium 254 



Visceral Skeleton 257 



Auditory Ossicles 258 



