Unit 5 Terms - Cnidaria and Ctenophora Flashcards
1
Q
- Name means “water serpent animal”
- includes: Hydra, Obelia, Physalia
- medusa have velum
A
Class Hydrozoa
2
Q
- name means “ cup-animal”
- includes: Aurelia
- no velum in medusa
A
Class Scyphozoa
3
Q
- name means “flower animal”
- includes: corals (like: Gorgonia and Tubipora) and anemones (like: Metridium)
- no medusa stage
A
Class Anthozoa
4
Q
an explosive cell containing one giant secretory organelle or cnida
A
cnidocyte
5
Q
- organelle that can be discharged from its cell
- can be stinging or adhesive
- more than 20 varieties, but most common is nematocyst
A
cnida (plural = cnidae)
6
Q
- stinging cnida
- used to inject toxin
A
nematocyst
7
Q
lid-like feature on a nematocyst
A
operculum
8
Q
trigger on a nematocyst, made from a modified cilium
A
cnidocil
9
Q
a diffuse nervous system, nerve cells equally dispersed around the body
A
nerve net
10
Q
the root-like base seen in a colonial hydrozoa such as Obelia
A
hydrorhiza
11
Q
the stalk of a colonial hydrozoa such as Obelia
A
hydrocaulus
12
Q
the inner, living/cellular part of the stalk (hydrocaulus)
A
coenosarc
13
Q
the outer, non-living chitinous sheath of the hydrocaulus
A
perisarc
14
Q
the feeding polyp seen in a colonial hydrozoa such as Obelia
A
hydranth
15
Q
reproductive polyps seen in a colonial hydrozoa such as Obelia
A
gonangium
