Animal Biology , Vol. 53, No. 4, pp. 339-346 (2003) Ó Koninklijke Brill NV, Leiden, 2003. Also available online - www.brill.nl Oxygen pro le in zebra sh embryo ( Danio rerio ) elucidated by theory and experiment SANDER KRANENBARG ¤ , JOS G.M. VAN DEN BOOGAART, JOHAN L. VAN LEEUWEN Experimental Zoology Group, WIAS, Wageningen University, Marijkeweg 40, 6709 PG Wageningen, The Netherlands Abstract —We present a numerical-experimental diffusion study in which we elucidate the spatial oxygen pro le around and inside a zebra sh embryo in the pre-circulation stage (24-28 hpf). Lowest oxygen partial pressures are found in the head with a gradient of posteriorly increasing pressure along the midline of the embryo. Furthermore, this study shows the yolk mass to have a relatively high oxygen permeability as compared to the surrounding medium and the respiring tissue. The oxygen permeability of the respiring tissue in this stage is close to that of water. Knowledge of the details of the oxygen distribution are important for an understanding of vasculogenesis and angiogenesis, since oxygen levels in uence the expression of endothelial growth factors. Keywords : angiogenesis; Danio ; micro-electrode; numerical model; oxygen; vasculogenesis. INTRODUCTION Animals without a
Animal Biology – Brill
Published: Jan 1, 2003
Keywords: NUMERICAL MODEL; OXYGEN; MICRO-ELECTRODE; DANIO; VASCULOGENESIS; ANGIOGENESIS
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