1. By John Cashman and Jason Holthaus
Annelids
By John Cashman and Jason Holthaus

2. What is it? Latin word anellis which means ring
Annelids are ringed worms
Differentiated by their segments
Length: <1 inch and upwards of 11 feet
Uses chaetae (small bristles) to move

3. What are Chaetae? Voice Thread!:)
A voice thread link that will help you to understand more about what the chaetae is and its function

4. Habitat
Oceans
Fresh Water
Land

5. Importance to Humans Earthworms are commonly sold as bait
The same goes with leeches
Earthworms are also do great things for the soil in gardens
Leeches saliva may someday also be used to prevent blood clots in humans

6. Food Source Heterotrophic creatures (require organic substances)
Earthworms ingest soil and extract nutrients from it
Leeches are predators that usually swallow their prey but sometimes just suck the blood
Bristle worms move their bristles and trap particles to ingest

7. How They’re Unique All have segmented bodies
Bodies are sealed with a wall or septa
Each segment contains separate body parts
They have evolved to be more adaptable to their environment

8. Polychaete Lives in marine habitat Over 10,000 different species
Ex. Bristle Worms
Polychaeta is Latin for “many bristles”

10. Oligochaeta Lives on land 3,500 species
Also live in swamps and marshes
Oligochaeta means "few-bristled”
Ex. Earthworms

12. Hiruindea Around 500 species Live on land, saltwater, and freshwater
Some suck blood, but many don't
Have little to no chaetae
Ex. Leech

14. Supporting Their Shape
Annelids use their strong muscles to support their shape
They are an invertebrate meaning they have no bones
Their ring-like muscles help them to support their shape

15. Respiration Oxygen is diffused through body surface
Then it is used by the capillaries
These are very close to the surface and make it easier to use the oxygen
Carbon Dioxide is then diffused back out through the skin

16. Reproduction Some Annelids use asexual reproduction
This means they can produce offspring by breaking off part of their body
Some are also hermaphrodites
This means they have characteristics of both sexes
Many though have either male or female and require a partner to reproduce
They develop segment by segment until adulthood

17. Nervous System Very primitive brain by the mouth
They have nerve cords traveling the length of their bodies
Sensory Organs
Eyes
Taste buds
Tactical Tentacles
Statocysts

18. Circulatory System Annelids have a closed circulatory system
Ring vessels function as small hearts
Blood moves to the head through a contractile vessel
The two main vessels are the dorsal and ventral blood vessels

19. Excretory System Central unit is the Nephridia
There are different types of Nephridia for different types of Annelids
The Protonephridia are joined to a duct that flushes out of the subject
The Metanephridia contain cilia and open to the outside of the subject

20. Digestive System One long digestive tract Food is stored in the crop
Ground up by the gizzard
They have unsegmented guts.
Also have separate pharynx and stomach

21. Examples Earthworms Bristle Worms Leeches Lug Worms Bamboo Worms
And thousands more

22. Basic Annelid Diagram

23. Works Cited
Flourence, Wayne K. "Annelida (Segmented Worms, Including Earthworms, Leeches and Polychaetes)." Biodiversity Explorer. 24 May Apr <
Miller, Kenneth R., and Joseph Levine. Biology the Living Science. Needham: Prentice Hall,
Myer, Phil. "Phylum Annelida." Animal Diversity Web University of Michigan Museum of Zoology. 02 Apr < Annelida.html>.
Parker, Steve. Nematodes, Leeches & Other Worms. Minneapolis: Compass Point Books,
Ramel, Gordon. "The Phylum Annelida." Earthlife. 7 Jan Earthlife Web. 1 Apr <
Rouse, Greg W. "Annelida." Tree of Life. 07 Aug Australian Research Council.1 Apr <
Russel, Bruce J. "Branches on the Tree of Life: Annelids." Bio Media Associates Apr <