xii CONTENTS. 



Ciliary Movement. 



PAGE 



93. Structure of a ciliated epithelium cell 162 



94. Nature of ciliary movement. Circumstances affecting ciliary move- 

 ments 163 



Amoeboid Movements. 



95. Nature of an amosboid movement ; its relation to a muscular con- 

 traction 166 



CHAPTER III. 

 ON THE MORE GENERAL FEATURES OF NERVOUS TISSUES. 



96. The general arrangement of the nervous system. Cerebro-spinal and 

 splanchnic or sympathetic system; somatic and splanchnic 

 nerves 169 



97. The structure of spinal ganglia. The ganglionic nerve cell. Bipolar, 



unipolar and apolar nerve cells 173 



98. The structure of ganglia of the splanchnic or sympathetic system. 



Multipolar cello. Spiral cells 176 



99. Grey matter and white matter of the central nervous system. 



Structure of a nerve cell of the spinal cord ; axis cylinder process 177 



100. Functions of nerve cells 178 



101. Reflex actions; the machinery required. The circumstances de- 

 termining the nature of a reflex action. Reflex actions often 

 purposeful 179 



102. Automatic actions . 183 



V 103. Inhibitory nerves 184 



CHAPTER IV. 

 THE VASCULAR MECHANISM. 



SECTION I. 

 THE STRUCTURE AND MAIN FEATURES OF THE VASCULAR APPARATUS. 



104, The chief work of the blood carried on in the capillaries and other 



minute vessels 186 



The Structure of Arteries, Veins and Capillaries. 



105. On some features of connective tissue. Gelatiniferous fibrillae. 



Connective-tissue corpuscles 187 



106. Elastic fibres , 189 



