Spider veins are small veins, most commonly found on legs on the superficial part of the skin. These veins are more common in women, due to pregnancy. Spider veins can be caused by age ...

As described above, the underlying pathologic process behind the formation of varicose veins lies within both deep and superficial reflux. Conventional teaching suggests that the underlying ...

It's called deep vein thrombosis, or DVT. All our veins have small valves powered by the muscles around them. They keep blood moving toward the heart, instead of flowing backward inside veins.

What happens in our body that make our veins look blue, although they are full of red blood? Follow Tech Insider: On Facebook Following is a transcript of the video: If our blood is red ...

except for the pulmonary vein) Allows diffusion of gases and nutrients from blood into the body cells Wall Thick, muscular Thinner Very thin, one cell thick Lumen Small Large Very small ...