The aorta is suited to its function by elastic tissue allowing stretching/recoil to smooth blood flow and maintain pressure; muscle for contraction to control flow; a thick wall to withstand pressure; smooth endothelium reducing friction; and the aortic valve preventing backflow.
A aorta é adaptada à sua função através do tecido elástico que permite esticar e recuar, suavizando o fluxo sanguíneo e mantendo a pressão; o músculo permite a contração para controlar o fluxo; a parede espessa resiste à pressão; o endotélio liso reduz o atrito; e a válvula aórtica impede o refluxo.
| Front | Explain four ways in which the structure of the aorta is related to its function. (4 marks) |
|---|---|
| Back | 1.Elastic tissue to allow stretching / recoil / smoothes out flow of blood / maintains pressure; 2.(Elastic tissue) stretches when ventricles contract OR Recoils when ventricle relaxes; 3. Muscle for contraction / vasoconstriction; 4.Thick wall withstands pressure OR stop bursting; 5.Smooth endothelium reduces friction; 6.Aortic valve / semi-lunar valve prevents back flow |
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