part of part_of cranial placode 颅骨板 lens placode 晶状体基板 A thickened portion of ectoderm which serves as the precursor to the lens. SOX2 and Pou2f1 are involved in its development[WP]. lens placodes placoda lentis 作为晶状体前体的外胚层增厚部分。 SOX2和Pou2f1参与其发展[WP]。 晶状体基板 presumptive structure 推定结构 immature eye 未成熟眼部 non-neurogenic ectodermal placode 非神经源性外胚层基板