Animal Kingdom Basics. Body Areas Head Back Tail end Belly.
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Transcript of Animal Kingdom Basics. Body Areas Head Back Tail end Belly.
![Page 1: Animal Kingdom Basics. Body Areas Head Back Tail end Belly.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649f135503460f94c26941/html5/thumbnails/1.jpg)
Animal Kingdom Basics
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Body Areas
Head
Back
Tail end
Belly
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Symmetry: Arrangement of the body parts around a central axis
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Asymmetry
Body that cannot be divided into equal
parts
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Radial Symmetry
Body arranged around a central axis
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Bilateral Symmetry
Body that can be divided into equal
halves
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Identify the following examples of symmetry as asymmetrical, radial, or
bilateral
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External Segmentation
Segments located on the outside of the body
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Internal Segmentation
Segments located on the inside of the body
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Skeletal SystemProvides structure and support for animals
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ExoskeletonSkeleton on the outside of the body;
external skeleton
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EndoskeletonSkeleton on the inside of the body;
internal skeleton
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Hydrostatic skeletonFluid-filled cavity surrounded by muscles;
fluid provides support
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Digestive SystemBreaks down food into energy
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Two-way Digestion*
One opening;
food goes in out the same
opening; moves in two
directions
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One-way Digestion
Two openings; Food goes in the “mouth” and out the “anus”; moves in one direction
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Circulatory SystemTransports oxygen throughout an organism
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Closed Circulatory SystemBlood moves throughout an organism closed
within blood vessels
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Open Circulatory System
“Blood” moves openly
throughout an
organism; No vessels
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Respiratory SystemExchange gases; Oxygen is taken in and
Carbon Dioxide is released.
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Diffusion
Oxygen moves across a thin membrane; carbon dioxide is release
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Feather-like structures that take in dissolved oxygen from aquatic
environments; releases carbon dioxide
Gills
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Lungs
Organ found in animals that take in oxygen from
the atmosphere; releases carbon
dioxide
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Nervous SystemTransmits signals throughout an organism;
allows a response to a stimulus
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Nerve Net
Net of nerves that spreads throughout an organism; lacks a control center
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Nerve CellControl center; nerve cords extend
throughout body; receive and carry messages
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IntegumentOutermost layer of an animal; functions in protection from dehydration, freezing, etc.
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Excretory SystemGets rid of waste in an organism
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Reproductive SystemProduces offspring
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BuddingOffspring grows from parent; Asexual
reproduction; Identical to parent
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Fragmentation
An organism is broken into pieces; the pieces grow into a new organism
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Hermaphrodite
Both sexes are present; produce sperm/egg
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External FertilizationUnion of the egg and sperm outside of the
organism
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Internal FertilizationUnion of egg and sperm on the inside of an
organism