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| Description: There are two types of blood vessels in the circulatory system of the body. They are: Arteries: that carry oxygenated blood from the heart to various parts of the body. Veins: that carry deoxygenated blood towards the heart. Artery vs Vein S.N. Characters Artery Vein 1 Direction of blood flow Carry blood away from heart to various parts of the body. Carry blood from the various parts of the body towards the heart. 2 Wall Thick walled so do not collapse when cut or after death. Also more elastic. Thin walled and collapse when cut or after death. Are less elastic. 3 Tunica externa Less developed and less strong. More developed and more strong. 4 Tunica media More muscular. Less muscular. 5 Tunica interna Endothelial cells more elongated. Endothelial cells less elongated. 6 Types Pulmonary and Systemic artery. Superficial veins, deep veins, pulmonary veins and systemic veins. 7 Lumen Narrow. Wide. 8 Layer of Muscle tissue Thicker to support the high pressure of blood. Relatively thin. 9 Nature of blood Oxygenated except pulmonary artery. De-oxygenated except pulmonary veins. 10 Position Deep seated except wrist, neck, etc. Superficial. 11 Color Red. Blue. 12 Blood pressure More (generally 120/80 mm of Hg). Less. 13 Valves No valves Valves are present that prevent back flow of blood. 14 Amount of blood About 15%. About 65%. 15 Movement Spurty movement of blood. Sluggish movement of blood. 16 Pulse Detectable. No detectable. 17 Contraction of muscle Present. Absent. 18 Disease Atherosclerosis. Deep vein thrombosis. Picture Stats: Views: 260 Filesize: 69.99kB Height: 450 Width: 600 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=40235 |