Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.
-
Upload
rosalyn-chambers -
Category
Documents
-
view
218 -
download
0
Transcript of Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.
![Page 1: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/1.jpg)
Worms
5th Grade
![Page 2: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/2.jpg)
3 major Phyla
• Flatworms
• Roundworms
• Segmented worms
![Page 3: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/3.jpg)
Characteristics of ALL worms
• Invertebrates
• Long, narrow bodies without legs
• Have head and tail ends
![Page 4: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/4.jpg)
Do they have tissues, organs, and body systems?
• Yes! Unlike sponges and cnidarians, worms DO have tissues and organs
• Worms are the simplest organisms WITH A BRAIN
![Page 5: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/5.jpg)
How does a worm’s brain and sense organs work?
• Sense organs can detect objects, food, mates, and predators quickly
• Sense organs that are sensitive to light, touch, and vibrations pick up information from the environment
• Brain interprets that information and directs the animal’s response
![Page 6: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/6.jpg)
Example:
• A worm’s sense organ senses the vibrations of a footstep, and the brain tells the worm to quickly return to its underground burrow
![Page 7: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/7.jpg)
Reproduction
• Worms have asexual and sexual reproduction depending on the species
• Some worms reproduce asexually by breaking into pieces.
• If you cut some kinds of worms into several pieces, a whole new worm will grow from each piece
![Page 8: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/8.jpg)
What kind of symmetry to worms have?
• Bilateral Symmetry
![Page 9: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/9.jpg)
1) Flatworms
• Flat
• soft like jelly
• Ex. Tapeworms, Planarians, Flukes
![Page 10: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/10.jpg)
Flatworms CAN be parasites
• Parasite: an organism that lives inside or on another organism
• Parasites take food from their host
• Host: the organism that the parasite feeds on
![Page 11: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/11.jpg)
Parasites:
• Rob their hosts of food • Make the hosts weak• May injure the host’s tissues or organs • Rarely kill host
• ALL flukes and tapeworms are parasites
![Page 12: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/12.jpg)
Fluke
![Page 13: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/13.jpg)
Flukes
• 10,000 species of flukes
• Range from .2 inches to 4 inches
![Page 14: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/14.jpg)
Tapeworm
![Page 15: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/15.jpg)
Tapeworms
• Attack the intestines
• Range from .04 inches to 50 ft
![Page 16: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/16.jpg)
Planarians
• Free-living flatworms
• Free-living organism: does not live in or on other organisms
• Glide over rocks in ponds, slide over damp soil, swim slowly through the ocean
![Page 17: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/17.jpg)
Planarians are scavengers!
• What is a scavenger?
![Page 18: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/18.jpg)
Scavengers: organisms that feed on dead or decaying material
• Planarians feed like a vacuum cleaner
• Glide onto their food and insert a feeding tube into it
• Digestive juices flow out of the planarian and into the food, breaking down the food while it is still outside of the body
• Planarian sucks up the partly digested bits
![Page 19: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/19.jpg)
Planarians are scavengers and predators
Either feed on dead or decaying food
Or
Attack any animals smaller than they are
![Page 20: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/20.jpg)
Planarians
![Page 21: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/21.jpg)
Planarians
• Size: usually between 1/8 of an inch to 1 inch
• Some tropical forms can be up to 2 ft!
![Page 22: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/22.jpg)
Planarians
• Have 2 dots that look like eyes
• Eyespots: can detect light but cannot see a detailed image as human eyes can
• Planarian head also has cells that pick up odors
• Planarians rely mainly on smell, not light to locate food
![Page 23: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/23.jpg)
Planarians
![Page 24: Worms 5 th Grade. 3 major Phyla Flatworms Roundworms Segmented worms.](https://reader035.fdocuments.us/reader035/viewer/2022062409/56649d8a5503460f94a70112/html5/thumbnails/24.jpg)
Tapeworm Life Cycle
• http://www.youtube.com/watch?v=EEBbtwGqPEs