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Circulation and Gas Exchange

What do you think?

LESSON

LESSON INTRODUCTION

Get Ready

Before you begin, decide if you agree or disagree with each of these statements.

As you view this presentation, see if you change your mind about any of the statements.

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  • Earthworms have an open circulatory system that transports blood and other substances throughout the body.
  • Gills and lungs are different structures that perform the same function.

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Circulation and Gas Exchange

Do you agree or disagree?

Get Ready

LESSON

LESSON INTRODUCTION

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Circulation and Gas Exchange

  • How do the types of gas exchange differ?
  • What are the differences between open and closed circulatory systems?

Key Concepts/Essential Questions

LESSON

LESSON INTRODUCTION

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  • diffusion
  • spiracle
  • gills

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  • open circulatory system
  • closed circulatory system

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Circulation and Gas Exchange

Vocabulary

Watch out for these words!

LESSON

LESSON INTRODUCTION

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Circulation and Gas Exchange

Underground Tunnels?

Look at the photo at the beginning of the lesson. The large, orange structure might look like the entrance to an underground system of tunnels, but it is part of an insect! Tiny holes such as this enable some organisms to exchange gases directly with the environment.

LESSON

LESSON INTRODUCTION

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Circulation and Gas Exchange

LESSON

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Earthworms have an open circulatory system that transports blood and other substances throughout the body.

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Circulation and Gas Exchange

Disagree. In earthworms, blood and other fluids are transported by closed blood vessels.

Do you agree or disagree?

Lesson Review

LESSON

LESSON WRAP-UP

Do you agree or disagree?

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Gills and lungs are different structures that perform the same function.

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Circulation and Gas Exchange

Agree. Gills exchange carbon dioxide for oxygen in water. Lungs exchange carbon dioxide for oxygen in air.

Do you agree or disagree?

Lesson Review

LESSON

LESSON WRAP-UP

Do you agree or disagree?

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How do the types of gas exchange differ?

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Circulation and Gas Exchange

Gas exchange occurs through gills in aquatic animals and through lungs or spiracles in terrestrial animals.

Key Concept/Essential Question Review

LESSON

LESSON WRAP-UP

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What are the differences between open and closed circulatory systems?

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Circulation and Gas Exchange

In open circulatory systems, blood surrounds all organs in the body. Closed circulatory systems use blood vessels to transport substances throughout the body.

Key Concept/Essential Question Review

LESSON

LESSON WRAP-UP