Keywords
sea urchin,embryo,embryonic,sea urchin embryo,sea urchin egg,32 cell,32 cell stage,zygote,zygotic,fertilization,fertilized,ovum,Strongylocentrotus purpuratus,echnoid,urchin,Echinoidea,echinoderm,Echinodermata,Bilateria,sea hedgehog,sea chestnut,sea potato,sand dollar,sea egg,sea porcupine,sea needle,sea urchin development,developmental stage,animal,eukaryote,model,model organism,biological model,animal model,animal testing,animal study,research model,sea urchin model,experimental model,research,scientific research,scientific study,laboratory research,animal research,biology,pathology,immunology,genetics,developmental biology,embryology,sea urchin embryo,sea urchin zygote