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Difference between Arteries and Veins: 

Characteristics

Arteries

Veins

Blood Circulation

Arteries carry blood away from the heart to the tissues of the body.

Veins carry blood from the tissues of the body back to the heart.

Blood Type

Arteries carry oxygenated blood expect pulmonary artery.

Veins carry deoxygenated blood except pulmonary vein.

Thickness

Arteries have thick elastic muscular walls.

Veins have thin non elastic less muscular walls.

Position

Arteries are usually positioned deeper within the body.

Veins are usually positioned closer beneath the surface of the skin.

Valves

Valves are absent.

Valves are present.

Lumen

These possess narrow lumen.

These possess wide lumen

Pressure

Blood flows under high pressure.

Blood flows under low pressure.

Color

These are reddish in color.

These are bluish in color.

Types

Pulmonary and systemic arteries.

Superficial veins, deep veins, pulmonary veins and systemic veins.

Internal Diameter

Narrower (4mm)

Wider (5mm)

Volume

Low (15%)

High (65%)

Movement

These show spurty movement of blood giving pulse.

These show sluggish movement of blood.

Pulse

Pulse is detectable in the arteries.

Pulse not detectable in the veins.

Walls

Arterial walls are more rigid.

Veins have collapsible walls.

Thickest layer

Tunica media

Tunica adventitia

Time of Death

Arteries empty up at the time of death.

Veins get filled up at time of death.

Oxygen level

Oxygen levels is quite high in arterial blood.

Oxygen level is low comparatively.

Carbon-dioxide level

CO2 level is low in arterial blood.

CO2 level is high in venous blood.

Injury to the Blood Vessel

Squirting blood

Pooling of blood

Contraction of muscle

Present

Absent

Diseases

Atherosclerosis, Angina Pectoris, Artherogenesis- myocardial ischemia.

Deep vein thrombosis, varicose veins.

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