Name the major vessels that enter and leave the heart, what they transport, and where they transport it to.
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What do we mean by systemic circulation and pulmonary circulation?
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What is the difference between an open and closed circulatory system?
In an open system the fluid directly contacts tissues.
In a closed system the fluid is confined to vessels and exchanges occur through vessel walls.
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What is the difference between single and double circulatory systems?
In a single circulatory system blood passes through the heart once per circuit (for example in fish).
In a double circulatory system blood passes through the heart twice per cycle (for example in mammals).
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Which factors increase an organism's need for a circulatory system with a pumping mechanism?
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Why do large, complex organisms require transport systems?
Large organisms tend to have a small surface area to volume ratio, so diffusion is too slow to transport required materials.
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