II. 8a/b. 



HI 



II. 8d. 



III. PHYSIOLOGY OF DEVELOPMENT 

 SUBDIVISION 



1 Theoretical problems 



2 Methods and technics 



3 General subjects (asexual development, etc.) 



4 Initial development 

 a General subjects 



b Primordial germ cells 



c Gameto-, ovo- and spermatogenesis 



d Maturation 



e Ovulation and oviposition 



f Activation and fertilization 



g Parthenogenesis 



5 Cleavage and mitosis 

 a Cleavage 



b Mitosis 



6 Further development o[ Invertebrates 



a General subjects (complete development) 

 b Primitive development (including early development) 

 c Induction and determination 

 d Development of part of the organism 

 e Development of special organ systems 

 (Cf. general subdivision p. 124 — 126) 

 f Histo- and cytochemistry 

 g Serological and immunological studies 



7 Further development o[ Vertebrates 

 a General investigations 



1 General subjects 



2 Complete development 



3 Later development 



4 Implantation and placentation 



5 Development of behaviour 

 b Primitive development 



1 Early development 



2 Gastrulation 



2/3 Gastrulation and neurulation 



Neurulation 



Development of neural crest 



