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Elastic recoil in arteries and veins. Take rings of artery and vein tissue. Load and unload with 10 g masses and hence assess differences in elasticity. Consider how the elastic properties suit the different functions of artery and vein in the circulatory system.
20 Ιουν 2024 · Contrast the functions of elastic arteries, muscular arteries and arterioles. (a) elastic arteries help propel blood onward while the ventricles are relaxing; (b) muscular arteries adjust the rate of blood flow and distribute blood to organs; (c) arterioles regulate the flow of blood into capillaries.
24 Νοε 2022 · Veins contain valves. These prevent the backflow of blood, helping return blood to the heart. A pulse is absent in veins due to the increased distance from the heart. Arteries have a thick layer of elastic and muscle tissue and a narrow lumen, while veins have a thin layer of elastic and muscle tissue and a wide lumen.
Activity 1.6 Investigating arteries and veins Student A1.06S Questions Q1 How do the results for artery and vein compare when looking at: a % change in length on loading? b return to the original length on unloading? Q2 What are the main properties of: a elastic fibres b collagen?
The elastic recoil of the vascular wall helps to maintain the pressure gradient that drives the blood through the arterial system. An elastic artery is also known as a conducting artery, because the large diameter of the lumen enables it to accept a large volume of blood from the heart and conduct it to smaller branches.
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