"Movement and Breathing" We exercise on campus PPT courseware

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"Movement and Breathing" We exercise on campus PPT courseware

Human breathing is actually a process of gas exchange, absorbing oxygen and expelling carbon dioxide and other gases from the body.

Measure the number of breaths in one minute

1. First measurement: the number of breaths in one minute during calm times.

2. Second measurement: the number of breaths one minute after exercise.

3. Compare these two data and discuss your findings.

4. The third measurement: the number of breaths over a longer period of time after exercise.

The number of breaths increases after exercise. Why?

During human exercise, a large amount of oxygen needs to be consumed, so the number of breaths is more than usual, and the amount of exhaled and inhaled gas is also larger than usual.

vital capacity

Vital capacity refers to the total amount of air that can be exhaled after inhaling with all one's strength.

The greater the lung capacity, the stronger the breathing ability.

Regular exercise will increase our lung capacity and obtain more oxygen.

1. Fill in the blanks.

(1) Compared with the inhaled gas, ( ) decreases, ( ) and water vapor increase, ( ) remains unchanged.

(2) Human breathing is actually carrying out ( ), allowing ( ) to enter the blood and expelling ( ) at the same time.

(3) In a calm state, I breathe about ( ) times and my heart beats ( ) times per minute.

2. True or False

(1) The gas we exhale is carbon dioxide. ( )

(2) Regular physical exercise can increase the body's lung capacity and is beneficial to physical health. ( )

(3) After exercise, the number of breathing and heartbeats per minute increases. ( )

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"Movement and Breathing" We exercise on campus PPT courseware 2:

"Exercise and Breathing" We are exercising on campus PPT courseware 2. Experience breathing. Method: Cover your nose with your hands, hold your breath, and pay attention to how you feel during the process of holding your breath. From the study in the previous class, we know that breathing will speed up after exercise..

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Update Time: 2024-09-27

This template belongs to science courseware E-education edition fourth grade science volume 1 industry PPT template

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