Dhouailly D, Sengel P
C R Acad Hebd Seances Acad Sci D. 1975 Oct 6;281(14):1007-10.
The absence of cutaneous appendages in glabrous skin areas of birds and mammals rises from the incapacity of the dermis to trigger off the development of feather and hair buds. The dermal cells from avian or mammalian glabrous regions are however able to induce the continuation and completion of feather or hair morphogenesis respectively, provided the initiation of appendage bud formation has been triggered off by dermis from feather- or hair-forming regions.
鸟类和哺乳动物无毛皮肤区域没有皮肤附属器，这是因为真皮无法触发羽毛和毛囊的发育。然而，来自鸟类或哺乳动物无毛区域的真皮细胞能够分别诱导羽毛或毛发形态发生的延续和完成，前提是附属器芽的形成已经由来自羽毛或毛发形成区域的真皮触发。
