entoderm

1. The gland cell in entoderm of hypostome was able to digest foods, but it had no hurt effect to other Hydra.
   垂唇内胚层腺细胞对食物有消化作用，对同类无伤害；
2. At the third weekend of human embryonic development, the embryo generates three original germ layers ( entoderm, mesoderm, ectoderm).
   人类胚胎发育到第3周末，胚胎产生三个原始胚层（内胚层、中胚层和外胚层）。

noun

1. the inner germ layer that develops into the lining of the digestive and respiratory systems

   Synonym:    endodermendoblastentoblasthypoblast