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Closed circulatory system
A method of transport where the blood remains in a continuous system of blood vessels
Open circulatory system
A method of transport where the heart pumps blood into vessels that are open ended
Prevents back-flow of blood from the right ventricle into the right atrium - 3 flaps
Prevent back-flow of blood from the aorta or pulmonary artery into the ventricles - 3 flaps
A small bundle of specialised tissue that causes the atria to contract, located in the right atrium (SA node)
Blood vessels that carry blood to the heart and have a relatively thin wall, a wide lumen and valves
Tough outer layer of arteries and veins, which prevents the walls from over-expansion
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