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Characteristics of Animals
•Eukaryotic cells
•Multicellular
•Heterotrophs
•Motile (at some stage of life)
•No cell walls
•“Moving, eating machines”
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BODY PLAN
–tissue layers
–symmetry and cephalization
–coelom (fluid-filled body cavity)
–embryonic development
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–tissue layers–symmetry and cephalization–coelom (fluid-filled body cavity)–embryonic development
Defines body plan
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Tissue
group of similar cells
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group of similar cells
Tissue
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Diploblasts
- organisms with 2 types of tissues
- (Ectoderm and Endoderm)
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organisms with 2 types of tissues
- Diploblast
- (Has ectoderm and endoderm)
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Triploblasts
- organisms with 3 types of tissues
- (Mesoderm, ectoderm, endoderm)
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organisms with 3 types of tissues(Mesoderm, ectoderm, endoderm)
Triploblasts
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Radial symmetry
- at least 2 planes of symmetry
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Bilateral symmetry
- 1 plane of symmetry
- (people
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1 plane of symmetry
Bilateral symmetry
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at least 2 planes of symmetry
Radial
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Not symmetrical
asymmetry.
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cephalization
(bilateral) development of head
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Coelom
•enclosed fluid-filled body cavity
- –circulation
- of oxygen and nutrients
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•enclosed fluid-filled body cavity
–circulation
of oxygen and nutrients
–support
and movement
coelum
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Pseudocoelomate
coelom partially lined with mesoderm (coelom imposter)!
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Coelom partially lined with mesoderm
Pseudocoelomate
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Coelomate
•“true” coelom lined with mesoderm
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•“true” coelom lined with mesoderm
coelomate
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•2 groups of coelomates
–Protostomes
–Deuterostomes
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–Protostomes
–Deuterostomes
•2 groups of coelomates
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HYDROSTATIC SKELETON
- •Formed by coelom
- •Allows movement without fins/limbs
- moves by controlling muscle contactions
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•Formed by coelom
•Allows movement without fins/limbs
Moves by controlling muscle contractions
Hydrostatic skeleton
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LIMBS
•Allow fast controlled movement
•Unjointed: sac-like
•Jointed:separate segments
–faster than unjointed
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4 types of feeders
–suspension
–deposit
–fluid
–mass
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–suspension
–deposit
–fluid
–mass
4 types of feeders
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SUSPENSION FEEDERS/ Filter feeder
- •Filter food particles suspended in
- water
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•Filter food particles suspended in
water
Suspension/filter feeder
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Deposit Feeders
•Eat their way through a substrate
- •“Food” contained with soil,
- deposits, etc
•Simple mouthparts
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•Eat their way through a substrate
•“Food” contained with soil,
deposits, etc
•Simple mouthparts
Deposit feeder
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Fluid Feeders
•Drink liquids
- •Mouthparts straw-like or
- sponge-like
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•Drink liquids
•Mouthparts straw-like or
sponge-like
Fluid feeders
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MASS FEEDERS
- •Take chunks of food into their
- mouths
•Mouthpart structures bite or scrape
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•Take chunks of food into their
mouths
•Mouthpart structures bite or scrape
Mass feeder
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