"Gas Exchange in the Human Body" PPT

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"Gas Exchange in the Human Body" PPT

Part One: Learning Objectives

1. Experimentally verify that exhaled gas contains more carbon dioxide

2. Understand the principles of gas exchange

3. Describe the gas exchange process in the human body

4. Describe the steps involved in the human body’s breathing process

Gas exchange in the human body PPT, Part 2: Comparison of inhaled gas and exhaled gas:

Thinking: Observe the picture above and state the change in the volume percentage of oxygen and carbon dioxide in the exhaled gas compared with the inhaled gas.

Oxygen has decreased and carbon dioxide has increased.

Note: It cannot be said that the exhaled gas has less oxygen and more carbon dioxide!

In other words, the inhaled gas has more oxygen and less carbon dioxide!

Gas exchange occurs in the human body

diffusion of gases

It always diffuses from areas of high concentration to areas of low concentration until equilibrium is reached.

Gas exchange in the human body PPT, part 3: The breathing process of the human body includes the following four links

1. Gas exchange between alveoli and the outside world

2. Gas exchange within the alveoli

3. Transport of gases in the blood

4. Gas exchange in tissues

Gas exchange in the human body PPT, part 4: practice

1. Blow air into the clear lime water. If the clear lime water turns turbid, it means there is more __ in the blown gas.

A Oxygen B Nitrogen C Carbon dioxide D Carbon monoxide

2. After the oxygen in the outside air enters the human body, it finally reaches __________.

A lungs B blood C heart D cells

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"Gas Exchange in the Human Body" PPT courseware:

"Gas Exchange in the Human Body" PPT Courseware Part One: Introduction of New Course How do you feel when you study in an unventilated classroom for a long time? Reason: The oxygen content in the air in the classroom decreases and the carbon dioxide content increases. Learning Objectives 1. Overview of alveolar...

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Update Time: 2024-09-08

This template belongs to biology courseware Jiangsu Education Edition Seventh Grade Biology Volume 2 industry PPT template

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