"Linematids and Annelida" Main Groups of Animals PPT Courseware 4

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"Linematids and Annelida" Main Groups of Animals PPT Courseware 4

1. Linear animals

Observe and think:

1. Observe the roundworm specimens to see the difference in shape and size of male and female roundworms, as well as the characteristics of body color and surface.

2. Observe the internal structure of roundworms. Which structural characteristics of roundworms do you think are suitable for parasitic life?

3. List common linear animals and summarize the main characteristics of linear animals.

4. What diseases can be caused by roundworms parasitic on the human body?

5. How to prevent ascariasis?

2. Annelida

In what environment can you find earthworms?

Answer: Earthworms live in moist, loose soil rich in organic matter.

Explore experiments:

1. Observe the shape and color of the earthworm’s body. Is the body of an earthworm segmented? What special structures are there on the segments near the front of the body? Are their colors the same as other parts?

2. Touch the surface of the earthworm with your hands. Is it dry or moist? Touch the ventral surface of the body segment of an earthworm. Is it smooth or rough?

3 How to distinguish the front end and back end of an earthworm?

4 Do earthworms move at the same speed on flat glass as on kraft paper? Why?

Give it a try, you can do it!

1 Which of the following is not a characteristic of annelids ( )

A The body is segmented B The body surface is dry and smooth

C There is mucus on the body surface D Lives in water or on wet land

2 The correct way to distinguish the front end and back end of an earthworm is ( )

Ring A is close to the front end B Ring is close to the back end

C The side with bristles D The side without bristles

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For more information about the PPT courseware "The Main Groups of Animals Nematodes and Annelida", please click the Main Groups of Animals ppt Nematodes and Annelida ppt tag.

"Linematids and Annelida" Main Groups of Animals PPT Courseware 8:

"Nematodes and Annelida" Main Groups of Animals PPT Courseware 8 Nematodes Please analyze the structural characteristics of roundworms. What are the characteristics suitable for parasitism in the human body? The body is cylindrical, with a mouth and anus; there is a cuticle on the body surface for protection, and the structure of the digestive tract...

"Linematids and Annelida" Main Groups of Animals PPT Courseware 7:

"Nematodes and Annelida" Main groups of animals PPT courseware 7 Independent learning, cooperative exploration Reading and thinking: ⑴ What are the differences in the morphology of male and female roundworms? ⑵Where do roundworms infest? What are the feeding habits of roundworms? (3) What is the body structure of roundworms? What are the benefits of roundworms...

"Linematids and Annelida" Main Groups of Animals PPT Courseware 6:

"Nematodes and Annelida" Main Groups of Animals PPT Courseware 6 Exploring Observation Observe the roundworm specimens to see the difference in shape and size between male and female roundworms, as well as the characteristics of the body color and surface. Observe the internal structure of roundworms. What structural characteristics do you think of roundworms?

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Update Time: 2024-11-25

This template belongs to biology courseware People's Education Edition Biology for Grade 8, Volume 1 industry PPT template

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