Werden auch die Blutgefäß beim Zunehmen von Gewicht größer, bzw. kleiner beim abnehmen?

There, where more tissue is created, new vessels are also built to supply the tissue. During removal, part of the then less filled storage tissue remains and thus also the cores supplying it.

This is practical for the organism, because after the “emergency time” there could be good food that can be stored for the next emergency time… A reason for the JoJo Effelt.