Kessel J, Fabian B C
Am J Anat. 1985 Jun;173(2):99-112. doi: 10.1002/aja.1001730204.
This scanning electron- and light-microscopic study traces the morphogenesis of the yolk-sac vascular system and extraembryonic coelom in the chick blastoderm. The fate of the mesodermal cells in both the area opaca vasculosa (AOV) and the area pellucida (AP) is followed, and the cellular patterning in these two areas is compared. We describe new details of the formation of coelom lining in the AOV, and new observations of the tendency of the intravascular blood island cells of the AOV to become flattened and attenuated. The morphogenesis of the blood system and coelom is analyzed in terms of polarized morphological patterns with coordinates in two modes:proximodistal (from the AP to the AOV) and dorsoventral (from the ectoderm to the endoderm). By highlighting differences in the methods of formation of blood vessels and coelom lining in the AP and AOV, this paper resolves some paradoxes in the literature.
这项扫描电子显微镜和光学显微镜研究追踪了鸡胚盘内卵黄囊血管系统和胚外体腔的形态发生过程。对血管区（AOV）和透明区（AP）中中胚层细胞的命运进行了追踪，并比较了这两个区域的细胞模式。我们描述了AOV中体腔衬里形成的新细节，以及AOV内血管血岛细胞变扁平变薄趋势的新观察结果。从具有两种模式坐标的极化形态模式方面分析了血液系统和体腔的形态发生：近远模式（从AP到AOV）和背腹模式（从外胚层到内胚层）。通过突出AP和AOV中血管和体腔衬里形成方法的差异，本文解决了文献中的一些矛盾之处。
