During diastole, the artery walls recoil, helping to smooth the flow of blood through the vessel. They have the greatest amount of elastin, enabling them to expand. Page 16. (ISH) Elastic arteries differ from muscular arteries both in size and in the relative amount of elastic tissue contained within the tunica media. 1200x. Rings cut from the aorta and a vein, 1 of each per group (Note 1), Hooks made from paperclips, 1 per group, with cotton attached if necessary (Note 2), VirKon solution 1% w/v, or other suitable disinfectant (Note 3). More smooth muscle in tunica media. The elastic recoil of the vascular wall helps to maintain the pressure gradient that drives the blood through the arterial system. Returning to the original length is the defining characteristic of elastic materials. This elastic tissue gives the blood vessels their much needed flexibility. Part A: Elastic recoil in arteries and veins Activity 1.5 Investigating arteries and veins Technician A1.05T Salters-Nuffield Advanced Biology, Harcourt Education Ltd 2005. Part A: Elastic recoil in arteries and veins 1Suspend a ring of artery from a hook on a clamp stand. When the heart relaxes, the recoil propels blood onward. The elastic fibres allow the arteries to dilate and constrict. Load and unload with 10 g masses and hence assess differences in elasticity. Load and unload with 10 g masses and hence assess differences in elasticity. Clear the work area before the procedure to avoid contaminating personal items, and disinfect the work area after the procedure. They give rise to medium-sized vessels known as muscular, or distributing, arteries. 4 Some groups have found that some samples will support a total mass of up to 300 g. The animal material used has not been produced for the purpose of the investigation – it is a regular by-product of the meat industry, available for consumption from some butchers, or part of the waste stream. a Take a close look at the artery and vein material. Some students may have religious objections to handling dead animal material, particularly pigs and cows, or to the method used to slaughter the animal. elastic recoil: [ re-koyl´ ] 1. to pull back quickly, such as towards a resting position upon removal of a strong opposing force. Use a metre rule to record the length of the ring once the mass carrier has been attached to the free end of the ring. They are directly receiving the oxygenated blood from the heart. (re´koil) a pulling back quickly. ResearchTopic The suitability of elastic recoil in arteries and veins BackgroundInformation The circulatory system has numerous of vessels. BioEthics Education Project: beep Visit this site for definitions and guidance on evaluating the data from this investigation. Elastic arteries include the largest arteries in the body, those closest to the heart. 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. Aortic aneurysm anterior • Aneurysms happen due to changes in the tunica ⿞ … The extracellular matrix is secreted by smooth muscles. The variability of an atherosclerotic artery to PTA injury results from variable dissection, thrombus formation, and cellular response to injury as well as variable scar contraction and elastic recoil. An elasticartery or conducting artery is an artery with a large number of collagen and elastin filaments in the tunica media. which of the following is NOT a treatment for a blocked coronary artery? 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