part of part_of develops from mesoderm 中胚层 lateral plate mesoderm 侧板中胚层 LPM Portion of the middle of the three primary germ layers of the embryo that resides on the periphery of the embryo, is continuous with the extra-embryonic mesoderm, splits into two layers enclosing the intra-embryonic coelom, and gives rise to body wall structures[MP]. lateral mesoderm lateral plate lateral plate mesenchyme mesoderma laminae lateralis 中胚层外侧薄层 位于胚胎外围的胚胎三个主要胚层的中间部分与胚外中胚层相连，分裂成包围胚胎内胚体的两层，并产生体壁结构[ MP。 外侧中胚层 外侧板 外侧板间充质 mesoderm-derived structure 中胚层衍生结构 embryonic tissue 胚胎组织 dense mesenchyme tissue 密集间充质组织 mesoderm 中胚层