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(A) A sketch map of the region. (B) Confocal images of the caudal vasculature of zebrafish embryos. The arrow points to ventral CVP capillaries without connection. Arrowheads point to vascular loops. Scale bar: 50 μm. (C) Quantification of the number of vascular loops in the CV: 36 hpf, n = 17 embryos; 48 hpf, n = 23 embryos; 54 hpf, n = 19 embryos; 60 hpf, n = 22 embryos; 72 hpf, n = 13 embryos.
