Gas Exchange in the Human Body PPT

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Gas Exchange in the Human Body PPT

Part I: Learning Objectives

1. Experimental verification shows that exhaled gas contains more carbon dioxide

2. Understand the principles of gas exchange

3. Explain the gas exchange process in the human body

4. Describe the steps in the human body's breathing process

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

Think: Observe the above figure and describe the change in the volume percentage of oxygen and carbon dioxide in the exhaled gas compared with the inhaled gas.

Oxygen decreases and carbon dioxide increases.

Note: You cannot say that exhaled gas has less oxygen and more carbon dioxide!

Or in other words, the inhaled gas contains 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 human respiratory process includes the following four steps

1. Gas exchange between alveoli and the outside world

2. Gas exchange within the alveoli

3. Gas transport in the blood

4. Gas Exchange in Tissues

Gas exchange in the human body PPT, Part 4: Practice

1. When you blow air into clear lime water, the clear lime water becomes turbid, which means that the ＿＿ in the blown gas has increased.

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

Keywords: Jiangsu Education Edition Grade 7 Biology PPT courseware free download, gas exchange in the human body PPT download, .PPT format;

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"Gas Exchange in the Human Body" PPT courseware:

"Gas Exchange in the Human Body" PPT Courseware Part 1 Content: Introduction to the New Lesson 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 the alveolar...

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Update Time: 2024-10-19

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

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