RE: Body Fat and blood vessels?
wholly dependant on your diet. training while having some fat on you can basically go 3 ways. if you are eating plenty then you will get bigger with "possible" fat loss in the long term due to an increased metabolism from the new muscle.
if you are not eating much then you wont put on much muscle and due to the increased metabolism you will "probably" lose some fat at some point.
or you could be eating just enough to keep your body in a stable condition and stay the same.
once again with fat loss in the long term.
if you want to lose fat then i would train with weights and do some cardio 3 times a week and watch what you eat. slowly it will come off.
it is possible to put on muscle and lose fat at the same time but takes dedication and/or good genetics.
the way i see it is unless you are dieting, fat loss is always going to be a long term thing.