1. MRS. LUFF 7 TH GRADE LIFE SCIENCE MEASUREMENTS OF CIRCULATORY SYSTEM

2. HEARTBEAT “LUB-DUB" sound made by the closing of the valves of the heart. LUB - tricuspid/bicuspid DUB – two semilunar ONE BEAT = ONE LUB-DUB

3. Increase Rate Decreased Rate Activity Caffeine Smaller body size (bird) Less physically fit Less activity (resting) Larger body size (horse) More physically fit HEARTBEAT

4. PULSE caused by the regular stretching and relaxing of the arteries when the blood spurts through them. PULSE RATE = HEARTBEAT RATE

5. Pulse Points Are felt wherever the arteries are close to the skin.  Wrist  Temples  Armpits  Ankles  Inside thigh  neck

6. BLOOD PRESSURE As the heart beats, the blood surges against the artery walls. A measure of this force is called blood pressure. Blood pressure is not a constant pressure. The pressure is great when the ventricles are pushes on the blood; thepressure is less when the ventricles are relaxed. 3. NORMAL BLOOD PRESSURE = 115/80 4. HYPERTENSION - high blood pressure

7. sphygmomanometer