The bloody kind
the type of blood vessels which flow contaminated blood to the heart are known as VEINS
Veins are the type of blood vessel that drains blood from tissues and returns it to the heart.
Mitral Insufficiency is a type of heart disease. Your heart has four chambers with valves between them that regulate the flow of blood through your body. Mitral insufficiency occurs when the valves don't fully shut, results in a leaking of blood into the other chamber.
Arteries carry blood away from the heart. Veins carry blood to the heart.
The heart must come from a person with the same blood type as the patient, unless it is blood type O negative. A blood type O negative heart is a universal donor and is suitable for any patient regardless of blood type.
oxygenated blood
Arteries
Veins.
Mixed blood
vein
vein
Arteries carry oxygen-poor blood from the heart; veins carry oxygen-poor blood back to the heart.