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27.1 science
Question | Answer |
---|---|
Name two types of unsegmented worms | flatworms and roundworms |
to what phylum do the flatworms belong? | platynelminthes |
flatworms are soft, flattened worms that have tissues and internal | organ system |
a fluid filled body cavity that is lined with tissue is called a | coelom |
what type of symmetry does a a flatworm have? | bilateral |
Flatworms rely on ____________ for respiration and excretion. | diffusion |
The muscular tube near the mouth that aids in getting food is called the _________________. | pharynx |
How do parasitic flatworms obtain their food? | from a host |
What type of flatworm has no digestive tract at all? | tapeworms |
What do flame cells do? | remove excess water from the body |
what is gaglia and do flat worms have it? | group of nerve cells. yes. |
what is a hermaphrodite? | an individual that has both male and female reproductive organs. |
_________ is when an organism splits in two and each half grows to become complete new organisms. | fission |
Turbellarians are ___________ flatworms that live in marine and fresh water. | free-living |
flukes are __________ flatworms that infect internal organs of their host. | parasitic. |
How does a blood fluke infect a human? | burrowing inside its skin |
blood fluke embryos develop inside what organisms? | humans |
schistosomiasis is widespread in tropical areas that lack proper ______ treatment | sewage |
Tapeworms are long, parasitic flatworms that are adapted to life inside the ________ of their host. Do tapeworms have digestive tract? | intestines. no. |
What is the head of the adult tapeworm called? | scolex |
what are proglottids? | segments that make up most of the worms body. |
How are tapeworm zygots passed out of the body? | feces |
the larvae of a tapeworm grow in the ______ of the intermediate host. | muscle tissue |
acoelomate | without coelom |
coelom | is a fluid filled body cavity that is lined with tissue derived from mesoderm. |
pharynx | muscular tube |
flame cells | remove excess water |
gangalia | group of nerve cells |
eyespot | detects dark and light |
hermaphrodite | has both male and female reproductive organs. |
fission | when an organism splits in half and grows back together. |
scolex | structure that can contain suckers or hooks. |
proglottids | segments that make up most of the worms bodies. |
testes | male reproductive organs. |