d lungs and larynx 

 e air-bladder 



8 Heart, vascular system and blood 

 a general subjects 



b heart 

 c/d arterial and venous system 

 e capillary system 

 f blood 



9 Coelomic cavities and endothelia, lympathic system and connective tissue 

 a/b coelomic cavities and endothelia 



c lympathic system 

 d connective tissue 



10 Urogenital system and sexual differentiation 

 a general subjects 



b/c kidneys; nephric ducts and bladder 

 d/e/f gonads (ovary and testis), genital tract and accessory glands 

 g sexual differentiation 



11 Endocrine glands 

 a general subjects 

 b hypophysis 



c thymus 



d thyroid gland 



e parathyroid glands 



f gonads 



g adrenals 



h pancreas 



I. DESCRIPTIVE AND COMPARATIVE EMBRYOLOGY 



SUBDIVISION 



1 Theoretical problems and general questions 



2 Methods and techniques 



3 General subjects (asexual development, reproduction, 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 of Invertebrates 

 EV Evertebrata 



P Protista 



A Porifera 



B Coelenterata 



C Vermes, Onychophora, Tardigrada, Linguatulida 



D Arthropoda 



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