Chapter 33 -7 Flashcards
1
Q
What happens in class cestoda?
A
- scolex attaches to intestine of the host
- proglottids grow from scolex
- Eggs are released in feces
(no digestive system)
2
Q
Bladder worms are in what class & phylum?
A
cestoda
phlatyhelminthes
3
Q
What happens to juvenile bladder worms when they are are eaten?
A
they release their scolex & attach to the host’s small intestine
4
Q
Schistosoma are in what class & phylum?
A
trematoda
phlatyhelminthes
5
Q
What are shcistosoma?
A
parasitic blood flukes
6
Q
What does schistosoma cause?
A
schistosomiasis
7
Q
What happens in schistosomiasis?
A
liver becomes infested & slowly deteriorates
8
Q
Larvae first infests what and then what?
A
snails (secondary host)
humans through skin
9
Q
Schistosomiasis causes how many deaths a year?
A
800,000
10
Q
Who is the primary host in schistosomiasis?
A
the larger male surrounds female & encloses her w/in his gynacophoric canal for the entire adult lives of the worms
