OESOPHAGUS 



Mammalia Sevcenko 



OESTROUS CYCLE 

 see Reproduction 



OLFACTORY ORGAN 



Homo Harris 



Mammalia Harris 

 Teleostei Bertmar 



OOCYTE 

 see Egg(s) 

 see also Gamete(s) 



OOGENESIS 



see also Gametes; Vitellogenesis 



Amphibia Kress 



Spornitz 



Arachnida Feiertag 

 Pijnacker 



Collembola Krzysztofowicz 



Crustacea Zerbib 



Hydrozoa Aisenstadt 



Insecta Gateff 



Matuszewski 

 Pijnacker 

 Romanowska 

 Stebbings 



Mammalia Ullmann 



Teleostei Zaitzev 

 autoradiography 



Amphibia Ficq 



Gastropoda Bottke 



Insecta Ogorzalek 



Teleostei Riehl 

 biochemistry 



Amphibia Denis 



Mazabraud 

 Wegnez 



Echinoidea Backstrom 

 Cognetti 



Gastropoda Bottke 

 Deri 



Insecta Duspiva 



Polychaeta Fischer 

 chromosomes 



Amphibia Lacroix 



Gastropoda Mancino 

 comparative study 



Deuterostom Colombera 

 cytology 



Insecta Chauvin 



Russo 



Aves 

 Insecta 



Ficq 



Ford 



Grippo 



Habrova 



Moreau 



Nevidek 



Wylie 



Kloc 



nucleo-cytoplasmic relations 

 Mammalia 



nucleolus 

 Gastropoda 



Balakiei 

 Tarkowski 



Kielbowna 

 Koscielski 

 Kopec 



Amphibia Olivereau 



OSSIFICATION 

 see Skeleton 



OSTEOGENESIS 

 see Skeleton 



OVARY 



see also Gonad(s) 



Oligochaeta 

 nutritive cells 



Hirudinea Fischer 

 parthenogenetic 



Crustacea Sabelli 

 physiology 



Crustacea 

 size synchronization 



Polychaeta Fischer 

 staging 



Cephaloch 



Teleostei 

 steroids 



Teleostei 

 tracer studies 



Aves Callebaut 



Johannisson 



Riehl 

 Riehl 



Colombo 



Mammalia 

 autoradiography 



Mammalia 

 biochemistry 



Insecta 



culture in vitro 

 Insecta 



cytogenetics 



Insecta 

 cytology 



Mammalia 

 development 



Homo 

 differentiation 



Mammalia 

 endocrinology 



Chondrostei 



Wegmann 



Byskov 



Mays 

 Ribbert 



Camenzind 

 Went 



Ribbert 



Lombard 



Peters 



Weakly 



Davidova 

 Dettlaff 



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