STUDIES ON CILIATED CELLS 



S. SAGUCHI 

 Medical Academy, Kanazawa, Japan 



ONE TEXT FIGURE AND FOUR PLATES 



CONTENTS 



I. Introduction 218 



II. Materials and methods of investigation 219 



III. Structure of ciliated cells 220 



A. Descriptions 220 



B. General considerations 228 



a. The manner of implantation of the cilia 228 



b. The cytoplasm and rootlets of the cilia 240 



IV. Function of the ciliary apparatus 243 



V. Regressive metamorphosis of ciliated cells 246 



A. Transformation of ciliated cells into cells of different nature . . . 246 



a. Historical 246 



b. Observations 247 



c. Summary 249 



B. Atrophy of ciliated cells 249 



C. Elimination of ciliated cells • 251 



VI. Regeneration of ciliated cells 251 



A. Transformation of other kinds of cells into ciliated cells 251 



B. Mitosis of ciliated cells 251 



a. The centrosome of the ciliated cell 252 



b. Summary 257 



C. Amitosis of ciliated cells 258 



D. Significance of mitosis and amitosis of ciliated cells 261 



VII. Development of ciliated cells 262 



A. Historical 262 



B. Embryonic development of the ciliary apparatus 263 



- C. Development of ciliated cells in the efferent tubule of testis of 



the mouse and rat 265 



D. Ciliogenesis in the daughter-cells produced by mitosis of the 



ciliated cell 266 



VIII. Henneguy-Lenhossok's hypothesis , . . . . 266 



IX. Bibliography 268 



217 



JOURNAL OF MORPHOLOGY, VOL. 29, NO. 1 



