ap l 2 pt 2

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8 Terms

1
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heart pacemaker

sa node

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p wave is

atrial depolarization

3
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so atrial depolarization is complete, av then

delays impulse

4
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qrs

ventricular depolarization

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ventricular depolarization is complete then

ventricular repolarization: t wave , then thats complete

6
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Capillaries

site of gas and

nutrient/waste exchange

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8
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What is the only type of vessel to not have three layers?

What layer does that type have?

Capillaries, tunica intima (tunica interna)