Figure 3: β-MNCs sprouted out from arterioles and venules and adherent to each other in tandem at one week after infarction production A: β-MNCs gathered in a portion of an arteriole (arrow), suggesting this area was the site of sprouting. Arrowhead: pre-existing arteriole. B: β-MNCs gathered in a portion of a pre-existing venule (arrow). Arrowhead: pre-existing venule. C: β-MNCs arising from a pre-existing arteriole (arrowhead) and adherent to each other in tandem (arrow). D: β-MNCs arising from a pre-existing venule (arrowhead) and adherent to each other in tandem (arrow).