A vein is a small tube that carries blood throughout our body.
You often hear about veins when talking about health or injuries. For example, if someone gets a puncture wound, it's because the needle accidentally hit one of their veins and started bleeding. Or maybe you know someone who has bad circulation in their legs and it's because they have a problem with their veins. Doctors might also talk about varicose veins when discussing common health issues with patients.
A blood vessel that transports blood from the capillaries back to the heart.
To mark with veins or a vein-like pattern.
