human embryonic development ,embryo outside of the fetal membrane, 8th week - 維管束植物 幅插畫檔、美工圖案、卡通及圖標胚胎, 草圖, 人體構造
seed, castor bean (ricinus communis), wheat (triticum vulgare), cocklebur (xanthium strumarium), spiderwort (tradescantia virginiana), onion (allium cepa) germination study - 維管束植物 幅插畫檔、美工圖案、卡通及圖標
mistletoe, viscum album, european holly, ilex aquifolium, oleander, nerium oleander, leaf cuticle sections - 維管束植物 幅插畫檔、美工圖案、卡通及圖標