Ml 



I. GENERAL SURVEST OF THE FROG .......... i 



A. Killing the Frog x 



B. External Anatomy of the Frog i 



C. The Buccal or Mouth Cavity 4 



D. Body Wall, Coelome, Mesenteries 5 



E. General Internal Structure 8 



II. GENERAL PHYSIOLOGY 14 



A. Function of the Nervous System; Irritability, Conductivity .... 14 



B. Function of the Muscular System; Contractility 15 



C. Function of the Digestive System; Digestion, Absorption 16 



D. Function of the Respiratory System; Respiration, Oxidation 18 



E. Function of the Excretory System ; Excretion 19 



F. Function of the Circulatory System; Circulation of the Blood .... 20 



G. Function of the Reproductive System; Reproduction, Development, the 

 Life-Cycle 20 



H. Summary of Physiological Processes .23 



III. GENERAL HISTOLOGY: CELLS AND TISSUES 24 



A. Study of a Typical Cell 25 



B. Studies of Tissues 26 



IV. GENERAL HISTOLOGY: STRUCTURE OF ORGANS 33 



A. Structure of the Liver 33 



B. Structure of the Intestine 33 



C. Structure of the Stomach 35 



D. Structure of the Skin 3$ 



E. Structure of the Kidney 37 



F. Structure of the Spinal Cord 3 8 



V. THE SPECIAL ANATOMY OF THE FROG 39 



A. The Digestive System 39 



B. The Urinogenital System 4 



C. The Respiratory System 4* 



D. The Circulatory System: the Venous System 4* 



E. The Circulatory System: the Arterial System 44 



F. The Circulatory System: the Structure of the Heart 45 



G. The Nervous System .46 



H. The Skeleton 5 1 



I. The Muscular System 55 



J. General Anatomical Principles ^i 



VI. THE PROCESS OF CELL DIVISION 



A. Mitosis in the Eggs of Ascaris 



B. Mitosis in Plant Root Tips 4 



C. Mitosis in the Eggs of the Whitefish 



XV 



