September 21, 2011 Warm Up Take out journals

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Presentation transcript:

September 21, 2011 Warm Up Take out journals Draw the two pictures above. Is picture a or b a real human heart? Explain how you know this.

Heart Rate http://www.strokeheart.org/CYPA/check.html 1. Find your pulse 2. count how many times you feel it beat Teacher will tell when to start counting and when to stop 3. Record time in journal 4. Run in place for 1 minute (teacher will time) 5. Do steps 1-4 again

Get silent.. listen to your heart.. Do you hear it???? Click on Picture: What causes that “LUB..DUB” sound you hear? http://www.youtube.com/watch?v=qYBtchCqPao The first heart sound or "lub" results from closure of the tricuspid and mitral valves. It is a rather low-pitched and a relatively long sound which, as indicated in, represents the beginning of ventricular systole. The second heart sound, or "dub," marks the beginning of ventricular diastole. It is produced by closure of the aortic and pulmonary (pulmonic) semilunar vanes when the intraventricular pressure begins to fall In others words: It is the opening and closing of your heart valvues

Teacher will pass out paperwork for today’s activity Follow along and fill in information as we go through it. http://www.explorelearning.com/index.cfm?method=cResource.dspDetail&ResourceID=662