Concept 30.2
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Presentation Created by 11th Grade students: Daniel Camey, Mariano Bran and Kevin Luttmann
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Concept 30.2
- 15. Figure 30-5 Blood flows to the pulmonary and systemic systems of the body through circuits composed of the heart and blood vessels.
- 17. Anatomy of the heart. Figure 30-6 Blood enters the heart through the atria and exits through the ventricles. Valves keep the blood from flowing in the wrong direction. (Note that the left and right sides of the heart refer to the person's left and right sides, causing them to appear reversed in this face-on view.)
- 20. The pacemaker sets the rate at which the heart contracts. Its signals generate electrical changes in the skin that can be measured as an electrocardiogram (ECG). The yellow color in the sample ECG below indicates the different stages of the heartbeat.
- 22. Figure 30-8 To measure blood pressure, an inflatable cuff is wrapped around a person's arm. As air is pumped in, the cuff squeezes the arm and closes a large artery. As air is slowly released from the cuff, the caregiver listens for the sounds of blood flowing through the artery.