Cnidaria Flashcards
CNIDARIA
What are cnidaria?,
The true jellyfish
Do they have stinging cells?
Yes
What are some other examples of cnidaria?
Hydras, corals, and anemones.
What type of plane of symmetry do cnidaria have?
Radial symmetry
What is the cecil form called?
Polyp
What is the modal form called
Medusa
What is the pedal disk?
For polyps to hold on to a surface
Do cnidartia have separate mouth and anus?
No
Are cnidaria diploblastic?
Yes
What does diploblastic mean?
Having 2 germ layers (exodermis and endoderm
What is mesoglea?
It is a later between the epidermis and the gastrodermis.
What is the gastrovascular cavity?
The gut/stomach with one way in and out
What do cnytocytes have?
Nematocysts
What does nematocyst mean?
Thread bladder
What is Cnidocil
the trigger, which when m oved causes the menatocyst to free
What are the four classes of Cnidaria?
Hydrozoa, scyohozoa, cubozoa, and anthozoa
What is an example of an organism in class Hydrozoa?
Hydras and portuguese man of war
What is Obelia?
A Hydrozoa that has reproductive polyps and feeding polyps
Do obelia have sperm and eggs?
Yes
After the Obelia zygote divides from mitosis, what is the next stage called?
Panula (larva)
Portuguese man of war (Hydrozoa)
It is a colonial organism with a gas bag, gonozoids, gastrozoids, dactylzoids (long strings) where their nematocysts are.
Class Scyphozoa
These are the true jellyfish
Class Cubozoa
They are the box jellies
