1. 3/24/14 Mr. Faia 6th Grade Science
WORMS
3/24/14
Mr. Faia
6th Grade Science

2. What Worms Have in Common
3 Major types of worms:
Flatworms
Roundworms
Segmented Worms

3. What Worms Have in Common
3 Major Phyla:
Platyhelmenthes
Nematoda
Annelida

4. What Worms Have in Common
All worms are invertebrates
Long, narrow bodies
No legs

5. What Worms Have in Common
Worms have a brain
Brain and sense organs are found in the head end

6. What Worms Have in Common
Worms can reproduce sexually and asexually
How can they reproduce asexually?
What is regeneration?

7. Flatworms
Soft bodies
Most flatworms are parasites
What is a parasite?

8. Flatworms Tapeworms live in intestines of other animals
Can grow to 10 to 12 meters long

9. Flatworms Planarians are scavengers Planarians also have eyespots
What is a scavenger?
What are eyespots?
How do planarians digest food?

10. Roundworms How many roundworms can live in a square meter of sand?
How do roundworms get food?

11. Roundworms
Roundworms have a digestive system that is a tube at both ends

12. REVIEW!!! What type of symmetry do worms have?
What are the 3 types of worms?
What are the 3 phyla of worms?
How do worms reproduce?
Define regeneration.
What is a tapeworm and how does it get food?
How do planarians ‘see’?
How do roundworms get energy?

13. Roundworms 1-way digestive systems are like an assembly line
Each part of the process happens at a different stop
This allows the animal to absorb more nutrients

14. Segmented Worms Found in most environments Live in burrows or tubes
Many are predators

15. Segmented Worms These worms are made up of linked segments
Earthworm usually has over 100 segments

16. Segmented Worms Every section has tubes that remove wastes
Nerves and a digestive tube run the length of the body
Reproductive organs are only in some sections, not all

17. Segmented Worms Segmented worms have a closed circulatory system
What might this mean?
What else has a closed circulatory system?

18. Segmented Worms
In segments 9 through 13, the worm has “hearts” to pump blood
These pump blood through the body

19. Segmented Worms Earthworms are scavengers
They come to the surface at night
Why?
Bristles help the worm move

20. Segmented Worms

21. Earthworms
Mouth –
Crop –
Gizzard –
Intestines -

22. Earthworms
Brain –
Ventral Nerve Cord –
Dorsal Nerve Cord -

23. Earthworms
Hearts –
Blood Vessels

24. Earthworms
Bristles –

25. REVIEW Part 2!!! List the 3 major phyla of worms?
How does a tapeworm obtain food?
Describe an earthworms body.
What kind of circulatory system does an earthworm have?
Which segments are the earthworms “hearts” found?
What digests dirt in an earthworm?