Blood vessel
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Blood vessels are the tubular structures of a circulatory system transporting blood in animal bodies. Blood vessels transport blood cells, nutrients, and oxygen to most of the tissues of a body, and a
Transmission electron micrograph of a microvessel displaying an erythrocyte (E) within its lumen which is deformed due to vasoconstriction
Vein
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A vein is a blood vessel in the circulatory system of humans and most other animals that carries blood towards the heart. Most veins carry deoxygenated blood from the tissues back to the heart; except
Blood vessel
…from the heart; the arterioles; the capillaries, where the exchange of water and chemicals between the blood and tissues occurs; the venules; and the veins, which carry blood from the capillaries back towards the heart. The word, vascular, is derived from the Latin vas, meaning vessel, and is used in…
Layers of vein wall shown in comparison to arterial wall
Main veins of the systemic circulation
Deep and superficial veins of the arm and near thorax
Diagram showing venous blood flow from capillary beds in some specific locations including the lungs, liver, and kidneys