In telophase, the cell is nearly done dividing, and it starts to re-establish its normal structures as cytokinesis (division of the cell contents) takes place. The mitotic spindle is broken down into its building blocks. Two new nuclei form, one for each set of chromosomes.
You should not, EVER, cut the renal artery. Doing so not only means that blood is no longer going to that kidney, but just as well, blood can't be filtered.
