The blood vessels, the arteries and veins of the body have some significant morphological differences. What are some of the most important and why do they exist?
Artery | Veins | Effects ( reasons why they exist) |
Thicker muscular layer ---> more elastic than veins | Thinner muscular layer---> less elastic than an artery | This due to artery need to handle higher pressure of blood than a vein.When blood ejected at high pressure from the heart goes to the artery. So in artery muscular layer is thicker to handle the high blood pressure exerted by the stroke volume, whereas in veins the blood pressure is minimal. This features also makes the arteries as reservoir vessels which can accommodate extra blood for use in an emergency. |
Does not have valves | Does have valves |
In artery, the forward flow of blood is maintained by the pressure exerted by heart, but in veins that pressure is minimal and unable to propagate blood towards the heart. In the vein, there is two mechanism for propagation of blood, on is valves which prevent backflow of blood, and second one pulsation of arteries, which helps propagation of blood towards the heart. |
Walls are more rigid due to thick muscular layer | Thinner due thin muscular layer | This makes arteries less vulnerable to superficial injuries than veins |
The blood vessels, the arteries and veins of the body have some significant morphological differences. What...
Part 1) Which of the following types of blood vessels would have the greatest resistance to flow? veins arteries venules capillaries Part 2) Which of the following blood vessels play an important role in controlling blood flow to different regions of the body through the contraction and relaxation of smooth muscles in their walls? capillaries arterioles venules veins
What do all veins have in common? What do all arteries have in common? Circle or highlight the correct underlying term. The pulmonary arteries carry oxygenated/deoxygenated blood, while the pulmonary veins carry oxygenated deoxygenated blood. Circle or highlight the correct underlying terms. The pulmonary/systemic circuit carries deoxygenated blood to the right/ left side of the heart where it is pumped to the lungs. The pulmonary/systemic circuit carries deoxygenated/oxygenated blood to the cells of the body.
Veins are not subjected to strong blood pressure like arteries but still have to return blood to the heart. True or false. Veins that carry blood away from the head and neck toward the heart rely on muscle contractions so that blood can be returned to the heart.
Laboratory Review 14 1. What blood vessels connect arterioles to venules and exchange molecules with tissue fluid? 2. Which blood vessels return blood to the right atrium? & Does the pulmonary artery carry blood back to or away from the hear? 41s the blood entering the left ventricle Or-poor or Ornch? 5. What valve prevents the backflow of blood when the left ventricle relaxes? Which circuit delivers blood to the spleen, the pulmonary or the systemic? . What vessel transports...
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