capillary
All blood vessels allow gases, such as oxygen and nitrogen, as well as liquids, enzymes, etc, to pass through them. Food particles, once absorbed by the small intestines, become part of this process.
Veins are the type of blood vessel that drains blood from tissues and returns it to the heart.
Yes, an artery is a type of blood vessel that carries oxygen-rich blood away from the heart to the rest of the body.
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Arteries
artery
Pulmonary veins.
isn't it your heart. = )
Veins
No, I think you mean "vein".
This is called an aneurysm.
Arteries