1-19-10- Circulation Worksheet 2

1-19-10- Circulation Worksheet 2 - BSC2011 SI: 1/19/2010...

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BSC2011 SI: 1/19/2010 Worksheet 2—Circulation Early multicellular animals and unicellular organisms do not have a _______________________, instead they use _______________________. Open vs. Closed Circulatory Systems Open Closed Blood Pressure (high or low) Circulatory Fluid Example More on Closed Circulatory Systems… - What are the circuits in a closed circulatory pathway? - How many chambers does a fish heart have? _________________ A mammal? _____________. A bird? ________________. An amphibian? ______________. An alligator? __________________ Vertebrate Blood Vessels - The pathway through blood vessels is: heart _____________________ ___________________ ________________________ ________________________ _____________________ heart - Arteries have (higher/lower) pressure than veins because… - ________________________________- single layer of endothelium where gas exchange takes place. The diameter is about 1 ____________________ thick. -
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1-19-10- Circulation Worksheet 2 - BSC2011 SI: 1/19/2010...

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