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Anonymous users2024-02-06The basic ones that can be seen on the surface of the body are veins, and the kanbudaode are arteries. Veins are blood vessels that carry blood back to the heart. Arteries are blood vessels that carry blood from the heart to organs throughout the body.
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Anonymous users2024-02-05The veins are on the surface of the body, they are easy to find, they are blue-purple, the arteries will pulsate, and they can only be touched and cannot be seen!
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Anonymous users2024-02-04The main differences are that the properties, characteristics and functions are different, as follows:
First, the nature is different.
1. Veins. Veins are blood vessels that collect backflow blood into the heart, often accompanied by corresponding arteries, with more numbers than arteries, thicker diameters, and more blood capacity. About 65 to 70% of the blood in the systemic circulation is contained in the vein (except for blood stored in the portal system, liver, and spleen).
2. Arteries. Arteries are blood vessels that originate from the heart and branch into arterioles and end in tissues.
Second, the characteristics are different.
1. Veins. The wall of the vein is thinner and weaker than the artery, and it is less elastic, so in the fixed stained section, the wall is often depressed, and the lumen is flattened or irregularly shaped.
2. Arteries. The blood flow velocity is faster due to the greater internal pressure. The arterial wall is thicker, the elastic fibers are more, and the lumen section is round, which has elasticity and a certain elasticity, and can beat significantly with the contraction of the heart and the level of blood pressure.
Third, the role is different.
1. Veins. Volume vascular.
2. Arteries. It carries blood from the heart to all parts of the body.
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Anonymous users2024-02-03: The organizational structure is different.
Arteries export blood from the heart, and veins feed blood from other parts of the heart into the heart: most arteries carry oxidized blood, most veins carry deoxygenated blood, and in the pulmonary arteries, venous blood is blood, and pulmonary veins are arterial blood.
Tube wall: Veins are thinner and weaker than arteries, less elastic, and arterial walls are thicker.
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Anonymous users2024-02-02Arteries: The blood vessels that carry blood from the heart to all parts of the body are called arteries. （1.The blood flow velocity is fast2Arterial distribution is 3The wall of the pipe is thick, and the elasticity is large).
Veins: are the blood vessels that carry blood from all parts of the body back to the heart. （1.Slow blood flow velocity 2The veins are shallowly 3Thin-walled, low-elastic) venous valves are used to prevent blood from flowing backwards.
It was summarized from the book by yourself, do not plagiarize.
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