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Zoology
PLHS - Haggard
Radiate Animals - Phylum Cnidaria
Class Hydrozoa
Hydra
Class Scyphozoa
Aurelia - jellyfish
Class Anthozoa
Metridium - sea anemone
Astrangia - stony coral
Terms to know and show on your illustrations:
Hydra
germ layers
gastrovascular cavity
polyp
medusa
mouth
buds
cnidocytes
nematocysts
Jellyfish
rhopalium
lappet
oral arm
gullet
pouches
gonad
gastric filament
Anemone
acontia
siphonoglyph
polymorphism
tentacles
gonads
epidermis
colloblasts
hypostome
basal disc
gastrodermis
tentacles
stomach
mouth
gastric
nematocyst
strobilation
peristome
septa
The student will:
1. Recognize the tissue levels of organization in the Hydra not seen in the protists
or sponges.
2. Draw and label all the specimens from the Anthozoa lucite block.
3. Observe at least 2 Hydra specimens in the watch glass under magnification.
Illustrate and label the features observed.
4. Prepare and maintain your own individual hydra/daphnia colony = KEEP THEM
ALIVE!
5. Research Craspedacusta sowerbyi. What are they and where can they be found?
Describe their structure, habitat, and life cycle. To which class or subclass do
they belong?
6. Describe each of the classes and subclasses of Cnidaria and list examples of
each.
7. Draw and label the structure of acnidocyte with nematocyct. Explain the
function in your illustration.
8. Observe and illustrate the jellyfish sample under magnification. Label as fully as
possible.
9. Diagram and describe the process of strobilation.
10. Illustrate and label fully the anemone specimen.
11. Fully describe how the structure of the stony coral show modification from the
body plan of the anemone?