Chapter 27.3 Flashcards
What is the phylum of flatworms?
Platyhelminthes
What kind of symmetry do flatworms have?
Bilateral
How many tissue layers do flatworms have?
Three
What is the word used to describe the nerve arrangement in flatworms?
Cephalization- concentration of nerve tissue at an animals “head” end
What type of tissue allows flatworms to become more active hunters?
Muscle
How do flatworms get energy?
Other living things, they are carnivores
How many body openings do flatworms have?
One
How do flatworms transfer gases?
Through diffusion; they do not have a respiratory or a circulatory system
How can flatworms reproduce?
Asexually or sexually
How would you describe the gender of most flatworms?
Hermaphroditic
What is odd about the reproduction of Planaria?
They can regenerate body parts
What is an endoparasite?
A parasite that lives inside of your body
What is an ectoparasite?
A parasite that lives outside of your body
What is an acoelomate and what is an example?
Organism with no space between their body wall and their gut, flatworm
What are the three major groups of flatworms and are they free-living or parasitic?
Turbellarians- free
Tapeworms- parasitic
Flukes- parasitic
Where do turbellarians live?
Marine
What are proglottids?
New sections of flatworms that produce both types of reproductive cells
What is Schistosomiasis?
A disease caused by flukes that is common in Africa, Asia, South America, and some Caribbean islands that is spread by water
What is the third tissue layer that tapeworms have that sponges and cnidarians do not?
Mesoderm
How are the tissues of tapeworms arranged?
Organs
Where do Planarians live?
Freshwater
What are teguments?
A thick protective layers of cells
