8 CONTENTS 



The Lymph Nodes 124 



Cortex 124 



Medulla 125 



The Hemolympli Glands 127 



The Spleen 127 



The Thymus 131 



CHAPTER IX. 



The Integument. 



Introduction 134 



Epidermis 134 



Dermis (Corium) 134 



Integument of Fishes 135 



Scales 135 



Integument of Amphibia 136 



Integument of Reptiles 138 



Integument of Birds 139 



Feathers 139 



Integument of Mammals 139 



Skin of Palm or Sole 140 



Sweat Glands 142 



Hairs 142 



Sebaceous Glands 144 



Mammary Glands 145 



Nails 146 



CHAPTER X. 



The Respiratory System, 



The Respiratory System of Fishes 148 



The Respiratory System of Amphibia 148 



The Respiratory System of Rejitiles 150 



The Respirator}^ System of Mammals 150 



The Larynx 151 



The Trachea 151 



The Lungs 152 



Bronchi and Branches 152 



Vascular Supply 155 



CHAPTER XI. 



The Digestive System. 



Mucous Membrane 157 



The Lips 158 



The Oral Cavity 159 



Teeth 159 



Tongue 159 



Salivary Glands 164 



Parotid Gland 164 



Submaxillary Glands 165 



Sublingual Glands 166 



Pharynx 166 



