By SoulSurvivorsGaming, writer at creators.co. DC and Marvel have dominated the comic book industry for decades now, causing millions of people to have a beloved list of their favorite superheroes and characters from those universes. Characters including: Batman, Iron Man, Spider-Man, Superman and even Aqualad.
There are three kinds of blood vessels: arteries, veins, and capillaries. Each of these plays a very specific role in the circulation process. Arteries carry oxygenated blood away from the heart. Theyâre tough on the outside but they contain a smooth interior layer of epithelial cells that allows blood to flow easily.
Veins are blood vessels that return deoxygenated blood from the outer parts of the body back to the heart and lungs. When veins become abnormally thick, full of twists and turns, or enlarged, they are called varicose vein. This happens most commonly in the veins in the legs and thighs.