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ch 14
sea invertebrates
42
Biology
10th Grade
02/17/2010

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Term
zoology
Definition
study of kingdom animalia
Term
estimated # of animal species
Definition
1,267,000
Term
Characteristics of Kingdom Animalia

Definition
1) Movement
2) Skeletal Support
3) Protective Body Covering
4) Nutrition (they are heterotrophic and consume food)
5) Respiration
6) Circulation (ie; transports materials throughout the body)
7) Excretion (enough said...)
8) Response (ie; Nerve impuls /Irritability)
9) Reproduction (Sexual/some have asexual parts)
Term
Spherical Symmetry
Definition

1 cut in any direction that goes through the center, results in equal halves

ex: cocus bacteria

Term
Radial Symmetry
Definition
Divided into equal halves by a cut made through the center of an animal along its length.
                            - Ie; Jellyfish


Term
Bilateral Symmetry
Definition
When only 1 cut can divide the body into two equal halves
- Ie; a frog
Term
Asymmetrical
Definition
Not symmetrical
- Ie; amoebas, blobs
Term
Cephalic
Definition
Head region
Term
Caudal
Definition
Tail region
Term
Anterior
Definition
Any region towards the head (starting from the stomach)
Term
Posterior
Definition
Any region towards the tail (starting from the stomach)
Term
Lateral
Definition
Sides
Term
Medial
Definition
Middle
Term
Ventral
Definition
Bottom
Term
Dorsal
Definition
Top
Term
Invertebrates
Definition
Animals without backbones
Term
Vertebrate
Definition
Animals with backbones
Term
# of animal species
Definition
1,267,000
Term
# of species in phylum arthropods (insects, lobsters, etc)
Definition
1,071,300
Term
# of species in mammals
Definition
4,400
Term
Phylum Porifera
Definition
Sponges
Term
Two different types of sponges
Definition
glass
spongin
Term
Glass
Definition
(contains hard spicule
Term
Spongin
Definition
contains soft,spongin fibers)
Term
Phylum Cnidera
Definition
jelly fish phylum
Term
Has two stages
Definition
Polyp & Medusa
Term
Polyp
Definition
Sessile stage / mouth & tentacles point up
Term
Medusa
Definition
Free moving / mouth & tentacles point down
Term
Mesoglea
Definition
Jelly-like layer that all Cnidereans have
Term
Class Hydrozoa
Definition
Organisms split equally between polyp & medusa stage
- Ie; Man-of-War
Term
Class Scyphozoa
Definition
Medusa stage dominant
- Ie; Jellyfish
Term
Class Anthozoa
Definition
Polyp stage dominant
-Ie; Corals & Sea Anemones
Term
Cnidoblasts
Definition
– Batteries of stinging cells
- Found on lots of cniderian
- Lined on the tentacles
- Produce nematocysts
Term
Nemocysts
Definition
Capsules containing poisonous barbs, long coiled threads, or a sticky substance
Term
Cephalization
Definition
Nerve cells concentrated in the head or anterior region
Term
Phylum Platyhelminthes
Definition
“The Flatworms”
Term
Class Turbellaria
Definition
Free living flatworms
- Planarians
(Characteristics)
- Have a pharynx
Term
Pharynx
Definition
Tube that passes food from the mouth to the intestine
Term
Mouth
Definition
located on its stomach, towards its posterior end
Term
Class Trematoda
Definition
“The Flukes”
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