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Topical BSI-lectin labeling and intralumenal FITC-albumin injection labeling of two blood capillary (c) blind ends connecting to a lymphatic capillary (L). Injected FITC-albumin identifies the blood capillary sprout lumens, which terminate (arrowheads) proximal to lymphatic/blood endothelial cell direct contact (arrows). Scale bar, 20 μm
