lymph

Cross section of the zebrafish heart 30 days after injury. The injured site (marked by an arrow) without a scar in a fish with normal lymphatic vessels (left) but not in a mutant fish that does not have these vessels (right)

heart of a fish

The endothelial cells, which make up the blood vessels of the zebrafish embryo (in red). The cell nuclei are marked in yellow. The stem cell pool is marked with an arrow

Wandering with gut feeling