archenteron ͵原肠
archenteron E原肠
archenteron ĥ原肠
celenteron archenteron原肠
archenteron U原肠
Gastrocoele Archenteron primitive gut原肠
N(名词) the cavity within an embryo at the gastrula stage of development that eventually becomes the digestive cavity (最终成为肠腔的)原肠腔