objective 99: 1. 2 3 4 5 6 7 8 9 objective 100: 10
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Objective 99:
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Objective 100:
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Fig. 20-12a. Conducting
system of the heart
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Fig. 20-13. Sequence of impulse conduction through the heart.
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Fig. 20-4b. Direction of ventricular fibers twists the heart during contraction.
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Objective 101:
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Fig. 21-2. Elastic and muscular arteries
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Fig. 21-5. Arterioles and capillary bed
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Fig. 21-2. Venules and veins
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Objective 102:
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Fig. 21-6. Valves in the veins
promote blood flow back to the heart.
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