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"Exercise and Heartbeat" We exercise on campus PPT courseware 2
Practical inquiry
Experiment 1: Put a thin rubber hose on a syringe, push the syringe rhythmically, and touch the hose with your hand. What does it feel like?
The syringe is like the heart, and the rubber tube is like the blood vessel. With rhythmic pushing, the rubber tube opens and closes, forming a pulse.
Experiment 2: Put a thin rubber hose on an inflatable rubber ball, squeeze it rhythmically like a ball, and touch the hose with your hand. How do you feel?
The inflated rubber ball is like the heart, and the hose is like the blood vessel.
The relationship between heartbeat and pulse
Through the test, the number of heartbeats and pulse beats are consistent.
Through experiments, do you understand why heartbeats and pulses occur?
Normally, the heart contracts and relaxes regularly. Every time the heart contracts and relaxes, we feel a heartbeat. During each heartbeat, blood from the veins flows into the heart, and blood from the heart flows into the arteries. When the heart contracts, a large amount of blood flows into the arteries, causing the arteries to dilate; when the heart relaxes, the arteries return to their original shape. The twitching produced by this artery is the pulse.
Classroom training
The heart's ability to contract and relax can be enhanced through physical exercise. Insist on regular exercise, and measure your heartbeat every month to see how effective the exercise is.
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"Movement and Heartbeat" We exercise on campus PPT courseware:
"Movement and Heartbeat" PPT courseware on our sports on campus Experiment 1 Put a thin rubber hose on an inflated rubber ball, squeeze the rubber ball rhythmically, and touch the hose with your hand. What does it feel like? Experiment 2 Put a thin rubber hose on the syringe and rhythmically...