Because skin is not very thick and blood vessels near the surface show through. They also raise the skin so you will be able to see where they are even if there was no change in colour.
The smallest blood vessels are called capillaries. The next largest are veins. The largest are arteries. Arteries are deeper in the body than veins and capillaries, which are closer to the skin. Some veins are also deep within the body. There is no type of blood vessel starting with the letter "A" that is close to the skin.
The heart PUMPS BLOOD through the arteries throughout your body. Veins take blood to your heart, arteries take blood away. some people think the heart pumps blood into your veins but that is NOT true. Your veins take the blood to your heart, the arteries take the blood away from your heart.
yes there are arteries, veins, and capilaries
If you gather all the veins and arteries together in your body, then it could wrap around the earth, twice!There are some veins and arteries that are smaller than a price of your hair!
Veins have ability to store blood but arteries not so they are more some for blood storage and some for blood transport to right arteria.
The circulatory system is made up of arteries, veins, and capillaries. Arteries are the deepest, except at the neck and groin. Veins are less deep and in some places can rise along the skin's surface, such as in the crook of the elbow and the backs of hands. Capillaries extend to the skin but are small so are mostly not noticeable. The same person can have arm veins that are deeper or more superficial when looking at both arms.
No. Many babies are born with visible veins.
Veins - because they are superficially placed and the arteries are deeply placed
Heart, veins, arteries, capillaries.
Generally, arteries, veins and capillaries. In the arm, some examples would be the axillar, brachial, radial and ulnar arteries. Veins could include the cephalic and median cubital veins.
The structures of arteries, capillaries, and veins are all different, because of their different functions. The only way that they are similar is because they are hollow, and have some elasticity.
The structures of arteries, capillaries, and veins are all different, because of their different functions. The only way that they are similar is because they are hollow, and have some elasticity.