 | Term | Definition |
| |
Eumetazoa |
Members of the subkingdom that includes all animals except sponges. |
| |
Radiata |
an animal that has radial symmetry |
| |
Bilatera |
animal possessing bilateral symmetry |
| |
What are the two phyla under Radiata? |
Cnidaria and Ctenophora |
| |
Radiata have a radial symmetry about an _____ |
oral-aboral axis |
| |
Radiata have a _________ plan |
sac body |
| |
Radiata have ____________ construction |
diploblastic |
| |
Radiata are what grade organization? |
Cell-tissue |
| |
Phylum Radiata have a true digestive cavity through means of ________ |
extracellular digestion |
| |
What forms from the ectoderm? |
Epidermis |
| |
What forms from the endoderm? |
gastrodermis |
| |
mesoglea |
a gelatinous (jelly-like) layer between the epidermis & gastrodermis |
| |
a layer of unsorted cells, spicules, and fibers |
mesenchyme |
| |
extracellular digestions means: |
digestion outside the body |
| |
Radiates are what kind of predators? |
"sit-and-wait" |
| |
Phylum Cnidaria have what two primary characteristics? |
cnidocytes and they are dimorphic |
| |
Cnidocytes are: |
stinging cells |
| |
What are the two dimorphic stages (or forms)? |
medusa and polyp |
| |
Nematocyst |
stinging structure with in each cnidocyte of a cnidarian that is used to poison or kill prey |
| |
Name the 3 structures of the cnidocyte: |
operculum, cnidocil, filament |
| |
Name 3 basic types of cnidocytes |
penetrant, glutinant, volvent |
| |
what does the volvent cnidocyte do? |
fire out and recoils around hairs/structures on prey |
| |
What are the 4 types of epidermal cell types? |
epitheliomuscular cells, glandular cells, interstitial cells, and neurosensory cells |
| |
what are sensory cells? |
a mechanical or chemical nerve impulse reception |
| |
two types of nerve cells: |
multipolar and bipolar |
| |
nerve cells form a: |
nerve net or nerve plexus |
| |
a nerve connection to epitheliomuscular cells forms ____________ systems |
neuromuscular |
| |
Gastrodermal cell types: |
nutritive-muscular cells, interstitial cells, glandular cells, neurosensory cells |
| |
what does dimorphic mean? |
that male and female are separate individuals |
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