I think you didn’t finish inputting the question? If you did, I don’t understand it.
The superior vena cava is the large vein which returns blood to the heart from the head, neck and both upper limbs. The inferior vena cava returns blood to the heart from the lower part of the body. The return of blood via the vena cava can be compromised and cause disease. (Take that info and see if it helps)
The traditional recommendation was that everyone should consult with their doctor before they started to exercise. The reason behind this is that, in theory, when you start to participate in a moderate or intense activity, there is a slightly increased risk of a heart attack or cardiac complications.
Well, aerobic exercises use oxygen while anaerobic do not. So I'd say aerobic. :)
First greeting !! because it’s asking you for an interaction. A interaction is a action that you do. So u must greet someone
