yolk sac
pl: yolk sacs
Related Words
embryofetuseggamnionchorionplacentaumbilical cordblastocystgastrulationnutrientproteinlipidallantoisgerm layerendodermmesodermectodermdevelopmentgestationovumzygotecleavageblastulamorulaorganogenesishematopoiesisblood cellstem cellvascularizationmembranesacvesicleyolkavianmammalreptileamphibianfishembryologyteratologyanatomyphysiologygrowthnourishmentabsorptiondiffusionmetabolismprimitive streaknotochordneural tubesomitetrophoblastinner cell massimplantationuterusovaryalbumen