The tube is attached to the needle in your arm, exposing the inside of the vein to the vacuum and drawing the blood out.) How red it is varies. After your blood is pumped to your lungs by your ...

My 10-year-old son asked me that blood is red in colour, but why do veins appear slightly blue in colour? Even I am confused at his question. What could be the reason for this? Please explain.

They occur due to the improper functioning of the veins and are characterized by swollen, bluish-purple or red veins close to the skin's surface. This vascular disorder is most prevalent in women ...

The term describes a “small cluster of blue or red veins that sometimes appear on your face or legs,” according to the NHS. These tend to be harmless, unlike trunk varicose veins, which can ...

But on the return trip to the lungs, after the blood cells have delivered the oxygen to tissues throughout the body, the deoxygenated blood flowing through veins is a much darker red, according to ...