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The pro-angiogenic effects on zebrafish embryos in the presence of 300 μg/mL catechu extracts. (A) Control, and (B) Catechu extract-treated. Red arrows indicate the formation of extra sprouts in the sub-intestinal veins of fish embryos. Sprout blood vessel number and blood vessel length are listed. About twenty embryos were used for each group. The measured blood vessel length unit (px) is defined using the software WenXin WximageView.
