Platyhelminthes (flatworms) Flashcards
1
Q
symmetry
A
bilateral
2
Q
body plan
A
-flattened dorsal ventrally (belly to back)
- lack segmentation
-acoelomate (solid all the way through)
3
Q
organ systems
A
digestive
osmoregulation (waste disposal)
nervous system
reproduction
4
Q
digestive
A
pharynx- muscular tube that opens to gut
gut- branched, sac like, bigger surface area
5
Q
osmoregulation (waste disposal)
A
- fluid passes through flame cells
-flame cells filter material
-passes to the outside through pores
6
Q
nervous system
A
- 2 nerve cords form net terminating in “brain”
- system cephalized -sense organs
7
Q
reproduction
A
hermaphroditic
8
Q
classes
A
turbellaria
Trematoda (flukes)
cestoda (tape worm)
9
Q
turbellaria
A
- free living
-primarily marine
10
Q
trematoda
A
-parasitic
- thick cuticle covers epidermis (protects organisms from digestive juices)
- oral suckers- attachment and feeling
- ventral suckers
-pharynx- behind oral suckers
- gastrovascular cavity
11
Q
cestoda
A
- parasitic
- thick cuticle
