Post on 17-Jan-2016
transcript
Animal Kingdom Basics
Body Areas
Head
Back
Tail end
Belly
Symmetry: Arrangement of the body parts around a central axis
Asymmetry
Body that cannot be divided into equal
parts
Radial Symmetry
Body arranged around a central axis
Bilateral Symmetry
Body that can be divided into equal
halves
Identify the following examples of symmetry as asymmetrical, radial, or
bilateral
External Segmentation
Segments located on the outside of the body
Internal Segmentation
Segments located on the inside of the body
Skeletal SystemProvides structure and support for animals
ExoskeletonSkeleton on the outside of the body;
external skeleton
EndoskeletonSkeleton on the inside of the body;
internal skeleton
Hydrostatic skeletonFluid-filled cavity surrounded by muscles;
fluid provides support
Digestive SystemBreaks down food into energy
Two-way Digestion*
One opening;
food goes in out the same
opening; moves in two
directions
One-way Digestion
Two openings; Food goes in the “mouth” and out the “anus”; moves in one direction
Circulatory SystemTransports oxygen throughout an organism
Closed Circulatory SystemBlood moves throughout an organism closed
within blood vessels
Open Circulatory System
“Blood” moves openly
throughout an
organism; No vessels
Respiratory SystemExchange gases; Oxygen is taken in and
Carbon Dioxide is released.
Diffusion
Oxygen moves across a thin membrane; carbon dioxide is release
Feather-like structures that take in dissolved oxygen from aquatic
environments; releases carbon dioxide
Gills
Lungs
Organ found in animals that take in oxygen from
the atmosphere; releases carbon
dioxide
Nervous SystemTransmits signals throughout an organism;
allows a response to a stimulus
Nerve Net
Net of nerves that spreads throughout an organism; lacks a control center
Nerve CellControl center; nerve cords extend
throughout body; receive and carry messages
IntegumentOutermost layer of an animal; functions in protection from dehydration, freezing, etc.
Excretory SystemGets rid of waste in an organism
Reproductive SystemProduces offspring
BuddingOffspring grows from parent; Asexual
reproduction; Identical to parent
Fragmentation
An organism is broken into pieces; the pieces grow into a new organism
Hermaphrodite
Both sexes are present; produce sperm/egg
External FertilizationUnion of the egg and sperm outside of the
organism
Internal FertilizationUnion of egg and sperm on the inside of an
organism