318 



INDEX 



Aortic arch, 



in chick, 173, 174, 178 

 48-hr., 218 

 72-hr., 224 



fate of, 179 



in frog, 735, 136 



origin of, 179 

 Archenteron, 



in amphibian, 64, 121, 122, 123 



in chick, 207 



roof of, 64, 83 



in sea urchin, 28 

 Area opaca, 209 

 Area pellucida, 209, 210 

 Area vasculosa, 27 0. 211 



formation of, 176, 7 77 

 Arm bud, of human, 276, 279 

 Artificial insemination, 52 

 Artificial vagina, 52 

 Aschheim-Zondek test, 23 

 Atrium, 



in chick, 

 48-hr., 276 

 72-hr., 223 

 Auditory nerve, 136, 167, 768 

 Auditory placode, 136, 768 



of human, 278, 280 

 Autocatalysis, in growth, 250 



Bile duct, 190 

 Birth, 



breathing at, 290 



effect of hormones on, 289 



effect of pituitary on, 290 



labor during, 290 



umbilical cord at, 290 

 Blastema, 232, 237, 239 

 Blastocoel, 



of amphibian, 64. 120, 121, 122, 123 



of chick, 204, 205 

 Blastocyst, in monkey, 266 

 Blastoderm, 204, 205, 209 



of chick, 80 



of duck, 81 

 Blastodisk, 204 

 Blastomeres, separation of, 8 

 Blastopore, 724 



of frog, 7 7 7 



in relation to primitive streak, 206 



of salamander, 7 78, 7 79 

 Blastula, 



of frog, 7 77 



Blastula — {Continued) 



of salamander, 7 78 



of sea urchin, 26 

 Blood, 



formation of, 

 early, 176 

 later, 288 



oxygenation of, 783. 184 

 Blood islands, 176 



in area vasculosa, 210 

 Blood vessels {see also Circulation and 

 names of individual vessels), 



degeneration of, 176 



growth of, 184 



origin of, 176 

 Body stalk, human, 268, 276 

 Bone formation, in human fetus, 286 

 Bowman's capsule {see Renal capsule) 

 Brain, derivatives of, 164, 76.5, 166 

 Branchial arches {see Visceral arches) 

 Branchial grooves {see Visceral grooves) 

 Branchial pouches {see Visceral pouches) 

 Breeding habits, 



effect of light on, 18, 79 



of frog, 112 

 Bulbus arteriosus, 



in chick, 



48-hr., 216, 220 

 72-hr., 225 



Carbohydrate, 



in human development, 277 

 utilization of, for growth, 253 



Carcinogenic agents, inducing power of, 

 87 



Cardinal venous system, 780, 181 



Carotid artery, 

 in chick, 174, 7 78 

 origin of, 179 



Cartilage, formation of, 195 



Catalysts (enzymes), in growth, 249 



Cavity, of blastocyst, 266 



Cell migration, 



in growth of blood vessels, 151 



in growth of mesonephric duct, 1 5 1 



during gastrulation, 120, 121, 122, 123 



in chick, 206, 207 

 of neuroblasts, 142 

 during neurulation, 128 



Central canal, 162 



Centrifuge, 30 



Centrum, of vertebra, 795 



