Worms
Hook: Think of as many examples of worms that you can.
Phylum Platyhelminthes
Platy _____________________
helminth ____________________
Flat worms (planaria)
• _______________symmetry
• One way gut. Only one opening in the digestive tract.

Hermaphroditic

Reproduction can be asexually through _____________ or ____________
through an exchange of sperm
Planarians,
• _______________or _______________
•
_______________of sensory organs (sensory organs are in the head)
• No _______________
• Muscular _______________ mid-body
Flukes
•
•
____________________, in various animal tissues
Complex life cycle
Platyhelminthes - flatworms
•
Tapeworms
•
_______________ parasites
No ______________________________
•
•
•
•
•
Absorb pre-digested food through body wall
_______________has hooks & suckers for attachment
Shed mature segments containing eggs
Cats and dogs get tapeworms by ______________________________.
_______________. They have been
measured at _______________.
A whale species has been measured at _______________.
In humans, Tapeworms often are
Phylum Nematoda
______________________________
• Have a _______________ digestive system (______________________________)
• Roundworms
• Abundant everywhere (soil, water, parasites in organisms of all kinds)
• Hook worms
• A species found in sperm whales can be ______________________________.
Pinworms
•
•
•
•
Common in ______________________________ , rare in the tropics
Estimated infection of children _______________
Lay eggs around the anus and ______________________________
Eggs stick to the fingers and are spread to other individuals
Elephantiasis
• Nematode infects _______________
• There is a global effort to eleminate the disease. They hope to have eliminated it by
2020.
Phylum Annelida
•
Segmented worms
•
•
•
Earth worms, _______________, _______________
_______________ symmetry
Have a _______________ and an _______________
Annelida - segmented worms
Earth Worms
Giant Earthworm of Australia can reach _______________________.
Ice cream cone worm
• Cements sand grains together to make a tube.