"What happens when you exercise (2)" Our Body PPT Courseware 2

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"What happens when you exercise (2)" Our Body PPT Courseware 2

The function of respiration is to carry out gas exchange, bringing oxygen into the blood and expelling carbon dioxide. We know that after exercise, the number of breathing increases and the number of heartbeats also increases. So what organ is related to beating?

Why does the heartbeat speed up?

The oxygen needed by the human body is inhaled by the lungs and then enters the blood. It is then transported by the heart to various parts of the body through blood vessels. At the same time, waste products such as carbon dioxide are collected and excreted from the body.

Using the information we already have to analyze, estimate how many times the heart can beat in a day?

60 times × 60 minutes × 24 hours 86,400 times

90 times × 60 minutes × 24 hours 129,600 times

Look at a simulated heart beating experiment:

Experimental equipment used: a basin, water, an ear cleaning ball, and a section of plastic pipe.

The first time: squeeze once per second, and the squeeze is required to be in place. Use tape to record the output water level after 20 consecutive squeezes (20 seconds).

Second time: squeeze 2 times per second. Use tape to record the output water level after 40 consecutive squeezes (20 seconds).

How is this experiment the same as the heart pumping blood? What do the similarities mean?

The ear cleaning ball is equivalent to the atrium and ventricle of the heart,

Plastic tubes are equivalent to blood vessels,

The water transported is equivalent to blood,

The pinching force of the hand is equivalent to the contractile function of the heart.

Since the heart will take a short rest, does it need more rest?

How to give your heart more rest?

Read the textbook and summarize

1. Get a reasonable rest and a good sleep

2. Exercise regularly to enhance cardiopulmonary function

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"What happens when you exercise (2)" Our Body PPT Download:

"What happens when you exercise (2)" The first part of our body PPT download content: Introducing a new lesson to explore why the heartbeat speeds up. Today we are going to do an experiment. We are not only competing to see who can play better, but also who can play better. You gain a lot of knowledge while playing...

"What happens when you exercise (2)" Our Body PPT:

"What Happens When You Exercise (2)" Our Body PPT Part One: Why does the heartbeat speed up? The human heart is located at the lower left side of the middle of the chest. It is shaped like a peach and is about the size of a fist..

"What happens when you exercise (1)" Our Body PPT Download:

"What Happens When You Exercise (1)" Our Body PPT Download Part One Content: Introducing the new lesson of measuring heartbeat and breathing Today we are going to do an experiment. We are not only going to compare who can play well, but also who can play well. You gain a lot of knowledge while playing. skeleton..

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Update Time: 2024-11-18

This template belongs to science courseware Fourth Grade Science Volume 1, Textbook Edition industry PPT template

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